NCHRP 368
State DOT Financial Auditing Requirements for Public Transportation Assistance
Programs
Accession Number:
01366178
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rrd_368.pdf
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Order URL: http://worldcat.org/isbn/9780309213943
Abstract:
This digest summarizes key findings from NCHRP Project 20-65(33), Determination of State
DOT Financial Auditing Requirements for Their Public Transportation Assistance Programs. It
documents various policies and procedures used by state departments of transportation (DOTs)
for conducting grantee financial audits, presenting best practices currently in use to enable state
DOTs to enhance and streamline their current financial auditing requirements. The digest was
prepared from the project final report.
NCHRP 369
AASHTO T 209: Effect of Agitation Equipment Type on Theoretical Maximum Specific
Gravity Values
Accession Number:
01361746
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rrd_369.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166689.aspx
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Order URL: http://worldcat.org/isbn/9780309213820
Abstract:
This digest summarizes key findings of research conducted in NCHRP Project 10-87(01),
"Precision Statements for AASHTO Standard Methods of Test." The digest is an abridgement of
the full final report. The goal of the research was to evaluate the effect of using various devices
and methods on measured values of the theoretical maximum specific gravity (G sub mm) of hot
mix asphalt. The variables examined included agitation and device type, vibration intensity of
mechanical shaking tables, order of placing water and mixture in vacuum container, and
duration of the vacuum/agitation process.
NCHRP 370
Guidelines for Project Selection and Materials Sampling, Conditioning, and Testing in
WMA Research Studies
Accession Number:
01364067
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rrd_370.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166751.aspx
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Order URL: http://worldcat.org/isbn/9780309213868
Abstract:
This digest summarizes the results of a workshop held on May 13, 2011 in Irvine, California, to
coordinate key warm mix asphalt (WMA) research projects. The results of the workshop are
presented in tables which contain a proposed core set of criteria, methods, and protocols,
including the following: field project selection criteria (Table 1); specimen preparation methods
(Table 2); conditioning methods for laboratory-mixed, laboratory-compacted (LMLC) specimens,
plant-mixed, laboratory-compacted (PMLC) specimens, and plant-mixed, field-compacted
(PMFC) specimens (Table 3); performance test methods for LMLC, PMLC, and PMFC
specimens (Table 4, Table 5, Table 6, and Table 7); and binder and aggregate test methods
(Table 8).
NCHRP 600
Human Factors Guidelines for Road Systems, Second Edition
Accession Number:
01379864
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167909.aspx Record URL:
http://onlinepubs.trb.org...rp/nchrp_rpt_600Second.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167909.aspx
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Order URL: http://worldcat.org/isbn/9780309258166
Abstract:
This report completes and updates the first edition of NCHRP Report 600 which was published
previously in three collections (NCHRP Reports 600A, 600B, and 600C). The report contains
guidelines that provide human factors principles and findings for consideration by, and is a
resource document for, highway designers, traffic engineers, and other safety practitioners.
Each of the design guidelines is presented using a consistent, highly structured format that is
intended to maximize ease of use and interpretability. The guidelines focus on providing specific,
actionable design principles, supported by a discussion and review of key research and
analyses. Special design issues and considerations are included to help address design
constraints and relevant trade-offs.
Report/Paper Numbers:
Project 17-47
NCHRP 693
Attracting, Recruiting, and Retaining Skilled Staff for Transportation System
Operations and Management
Accession Number:
01362962
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_693.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166342.aspx
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Order URL: http://worldcat.org/isbn/9780309213844
Abstract:
This report presents guidance to help transportation agencies recruit and retain qualified
professional staff in the Systems Operation and Management (SOM) area. It is based on an
analysis of SOM career paths, skill requirements, and training needs to identify successful
programs, state-of-the-art initiatives, and best industry practices. This report will be useful for all
transportation professionals working in the SOM area and the Human Resources staff who
address their personnel requirements.
Report/Paper Numbers:
Project 20-86
NCHRP 694
Evaluation and Performance Measurement of Congestion Pricing Projects
Accession Number:
01357274
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_694.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166596.aspx
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Order URL: http://worldcat.org/isbn/9780309213615
Abstract:
These guidelines are intended for transportation practitioners involved in the planning, design,
and operation of congestion-pricing projects. They will help agencies select or develop
measures to evaluate these projects, collect the necessary data, track performance, and
communicate the results to decision makers, users, and the general public. These guidelines
will be valuable to all agencies who are using or considering congestion pricing to manage their
roadway capacity.
Report/Paper Numbers:
Project 08-75
NCHRP 697
Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile
Foundations by Improving Weak Soils
Accession Number:
01351453
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_697.pdf
Availability:
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Washington, DC 20001 USA
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URL:http://www.trb.org/Main/Blurbs/Design_...Increasing_the_Lateral
_Resis_165939.aspx
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Order URL: http://worldcat.org/isbn/9780309213417
Abstract:
This report presents design guidance for strengthening of soils to resist lateral forces on bridge
pile foundations. Lateral loads may be produced by wave action, wind, seismic events, ship
impact, or traffic. Strengthening of soil surrounding the upper portions of piles and pile groups—
for example by compaction, replacement of native soil with granular material, or mixing of
cement with soil—may be more cost-effective than driving additional piles and extending pile
caps as ways to increase the bridge foundation's capacity to resist lateral forces associated with
these loads. This report presents computational methods for assessing soil-strengthening
options using finite-element analysis of single piles and pile groups and a simplified approach
employing commercially available software. The analysis methodology and design guidelines
will be helpful to designers responsible for bridge foundations likely to be exposed to significant
lateral loads.
Report/Paper Numbers:
Project 24-30
NCHRP 701
Proposed Specifications for LRFD Soil-Nailing Design and Construction
Accession Number:
01355204
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_701.pdf
Availability:
Transportation Research Board Business Office
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166187.aspx
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Order URL: http://worldcat.org/isbn/9780309213516
Abstract:
This report contains proposed specifications for the design and construction of soil-nailed
retaining structures. Despite their advantages in cut applications, these structures are not
available to some state departments of transportation, due to the lack of guidance for their use
in AASHTO's standard specifications based on load and resistance factor design (LRFD). This
report will be of interest to geotechnical engineers and construction managers, who would like to
promote a more common utilization of soil nailing.
Report/Paper Numbers:
Project 24-21
NCHRP 703
Guide for Pavement-Type Selection
Accession Number:
01353742
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_703.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/165531.aspx
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Order URL: http://worldcat.org/isbn/9780309213486
Abstract:
This report presents a recommended "Guide for Pavement-Type Selection." The guide includes
practical, logical, and transparent processes for conducting systematic evaluations of pavement
alternatives and for making decisions on pavement-type selection. These processes can be
used for both agency-based and contractor-based type selections and may be applied to
different pavement types and structures. These processes are supplemented by examples to
illustrate the application of the recommended guide for the commonly encountered scenarios of
alternative bidding and design-build of operations and maintenance projects. The material
contained in the report will be of immediate interest to state pavement engineers, design
consultants, paving contractors, and others involved in project design and pavement-type
selection.
Report/Paper Numbers:
Project 10-75
NCHRP 706
Uses of Risk Management and Data Management to Support Target-Setting for
Performance-Based Resource Allocation by Transportation Agencies
Accession Number:
01356727
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_706.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166250.aspx
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Order URL: http://worldcat.org/isbn/9780309213622
Abstract:
This report describes how risk management and data management may be used by
transportation agencies to support management target-setting for performance-based resource
allocation. As the final product of a second phase of NCHRP Project 08-70, Target-Setting
Methods and Data Management to Support Performance-Based Resource Allocation by
Transportation Agencies, this report supplements NCHRP Report 666, "Target-Setting Methods
and Data Management to Support Performance-Based Resource Allocation by Transportation
Agencies: Volume I: Research, Volume II: Guide for Target-Setting and Data Management,"
published in 2010. Transportation agencies at all levels of government are embracing
performance measurement to improve agency efficiency and accountability. Setting
performance targets generally entails balancing competing objectives and dealing with political
implications in a context of uncertainties about economic conditions, fiscal constraints, climate
conditions, customer demands, and more. Good data on the transportation system and its
performance provides the information managers need to set targets, but good management
depends on clear understanding of the risks that future conditions will differ significantly from
what today's best information suggests. Performance targets and consequent resourceallocation decisions established with such understanding are more likely to ensure that the
agency and the transportation system perform well. This report presents advice and illustrative
case studies, in the form of primers, on using risk management and data management practices
in support of performance-based resource allocation, and specifically performance-target setting.
The information will be useful to senior agency managers seeking to develop and improve their
performance-management practices.
NCHRP 707
Guidelines on the Use of Auxiliary Through Lanes at Signalized Intersections
Accession Number:
01359807
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_707.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166520.aspx
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Order URL: http://worldcat.org/isbn/9780309213752
Abstract:
Lanes for through movements that begin upstream of a signalized intersection and end
downstream of the intersection—auxiliary through lanes (ATLs)—are recognized as a moderatecost approach to increase intersection and overall corridor capacity. This report provides
guidelines to use for justification, design, and analysis of ATLs at signalized intersections. The
report is aimed to assist transportation professionals in the effective and safe use of intersection
auxiliary through lanes.
Report/Paper Numbers:
Project 03-98
NCHRP 708
A Guidebook for Sustainability Performance Measurement for Transportation
Agencies
Accession Number:
01357273
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_708.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166313.aspx
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Order URL: http://worldcat.org/isbn/9780309213653
Abstract:
This guidebook provides state departments of transportation (DOTs) and other transportation
agencies with a practical and easy-to-use approach to identify and apply sustainability-related
performance measures, some number of which may already be integrated into agency business
practices, to produce a new lens through which decision makers can view their agency's
performance. It describes the underlying principles of sustainability as it relates to transportation,
possible goals that can be used to address those principles, and performance measures that
can be used to address those goals. Aspects of sustainability-related performance measures,
including data sources and examples of use, are discussed. A reference compendium of
performance measures has also been provided. This guidebook should be of immediate use to
those who have mastered the basics of performance measurement and who are familiar with
their own agencies' performance measurement program, but who are challenged with providing
useful information to agency leadership on how effectively their organization is meeting or can
meet sustainability goals. Examples from DOTs, private industry, and Europe illustrate how
sustainability can be successfully added to an agency's extant performance measurement
system.
NCHRP 709
Investigation of Short-Term Laboratory Aging of Neat and Modified Asphalt
Binders
Accession Number:
01359808
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_709.pdf
Availability:
Transportation Research Board Business Office
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166483.aspx
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Order URL: http://worldcat.org/isbn/9780309213639
Abstract:
This report provides a proposed method of test for short-term laboratory aging of neat and
modified asphalt binders using the Modified German Rotating Flask (MGRF) as an alternative to
the Rolling Thin Film Oven Test (RTFOT, AASHTO T 240). Thus, the report will be of immediate
interest to staff of state highway agencies, materials suppliers, and paving contractors with
responsibility for specification and testing of asphalt binders.
Supplemental Notes:
Appendixes A through E are not published herein but are available on the NCHRP Project 9-36
project webpage on the TRB website.
Report/Paper Numbers:
Project 09-36
NCHRP 711
Guidance for the Selection, Use, and Maintenance of Cable Barrier Systems
Accession Number:
01444859
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167753.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_711.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167753.aspx
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Order URL: http://worldcat.org/isbn/9780309258425
Abstract:
This report provides guidance for the selection, use, and maintenance of cable barrier systems.
While cable barrier systems have been in use for more than 70 years, their use has been on the
rise and is expected to continue in the future. The increase in use of cable barrier systems has
been attributed to the success rate in keeping vehicles from crossing the median, reducing
roadway departures, and decreasing impact severity. Due to advancements in cable barrier
system technology, installation and repair costs are lower and cable barrier use has increased
in varying roadway environments. Safety studies, although limited, have shown that cable
barriers help reduce those median cross-over collisions that lead to some of the most severe
head-on type crashes. This document will be of particular interest to design, maintenance, traffic,
and safety engineering professionals.
Report/Paper Numbers:
Project 22-25
NCHRP 712
Optimization of Tack Coat for HMA Placement
Accession Number:
01367867
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/166969.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_712.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166969.aspx
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Order URL: http://worldcat.org/isbn/9780309213974
Abstract:
This report presents proposed test methods for measuring the quality and performance
characteristics of tack coat in the laboratory and the field, as well as a training manual
presenting proposed construction and testing procedures for tack coat materials. Thus, the
report will be of immediate interest to staff of state highway agencies, materials suppliers, and
paving contractors with responsibility for selection, testing, and use of tack coat materials.
Report/Paper Numbers:
Project 09-40
NCHRP 713
Estimating Life Expectancies of Highway Assets. Volume 1: Guidebook
Accession Number:
01370736
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167189.aspx
Record URL:
http://onlinepubs.trb.org.../nchrp/nchrp_rpt_713v1.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167189.aspx
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Order URL: http://worldcat.org/isbn/9780309214070
Abstract:
This two-volume report provides a methodology for estimating the life expectancies of major
types of highway system assets, in a form useful to state departments of transportation (DOTs)
and others, for use in lifecycle cost analyses that support management decision making.
Volume 1 is a guidebook for applying the methodology in DOT asset management policies and
programs. Volume 2 describes the technical issues and data needs associated with estimating
asset life expectancies and the practices used in a number of fields—such as the energy and
financial industries—to make such estimates.
Report/Paper Numbers:
Project 08-71
NCHRP 713
Estimating Life Expectancies of Highway Assets. Volume 2: Final Report
Accession Number:
01370737
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167188.aspx
Record URL:
http://onlinepubs.trb.org.../nchrp/nchrp_rpt_713v2.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167188.aspx
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Order URL: http://worldcat.org/isbn/9780309214087
Abstract:
This two-volume report provides a methodology for estimating the life expectancies of major
types of highway system assets, in a form useful to state departments of transportation (DOTs)
and others, for use in lifecycle cost analyses that support management decision making.
Volume 1 is a guidebook for applying the methodology in DOT asset management policies and
programs. Volume 2 describes the technical issues and data needs associated with estimating
asset life expectancies and the practices used in a number of fields—such as the energy and
financial industries—to make such estimates.
Report/Paper Numbers:
Project 08-71
NCHRP 714
Special Mixture Design Considerations and Methods for Warm Mix Asphalt: A
Supplement to NCHRP Report 673: A Manual for Design of Hot Mix Asphalt with
Commentary
Accession Number:
01359809
Record Type:
Monograph
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_714.pdf
Availability:
Transportation Research Board Business Office
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166517.aspx
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Order URL: http://worldcat.org/isbn/9780309213738
Abstract:
This report provides a mix design method tailored to the unique material properties of warm mix
asphalt (WMA) technologies in the form of a supplement to NCHRP Report 673, "A Manual for
Design of Hot Mix Asphalt with Commentary." The report will be of immediate interest to
materials engineers in state highway agencies and industry.
Report/Paper Numbers:
Project 9-43
NCHRP 715
Highway Safety Manual Training Materials
Accession Number:
01371663
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167185.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_715.pdf
Availability:
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Order URL: www.trb.org/Main/Blurbs/167185.aspx
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Order URL: http://worldcat.org/isbn/9780309213882
Abstract:
This report provides the training materials to aid in implementing the AASHTO Highway Safety
Manual (HSM). The training materials provide a broad overview of the HSM format and
procedures. The enclosed CD-ROM (CRP-CD-106) includes presentation slides with speaker
notes, participant handouts, interactive sample problems, smart spreadsheets, and similar
supporting documents. Since the target audience for this training is transportation professionals
who are not required to have a vast knowledge of safety assessment procedures, the collection
of training material includes basic introductory information as well as specific content for
advanced procedures where appropriate. The report also briefly addresses the preferred
expertise of the candidate instructors so as to enhance the learning experience for all involved
parties. The report will be of particular interest to safety practitioners responsible for developing
and managing highway safety improvement programs.
Report/Paper Numbers:
Project 17-38
NCHRP 716
Travel Demand Forecasting: Parameters and Techniques
Accession Number:
01368702
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167055.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_716.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://http://www.trb.org/Main/Blurbs/167055.aspx
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Order URL: http://worldcat.org/isbn/9780309214001
Abstract:
This report is an update to NCHRP Report 365, "Travel Estimation Techniques for Urban
Planning" and provides guidelines on travel demand forecasting procedures and their
application for solving common transportation problems. The report presents a range of
approaches that allow users to determine the level of detail and sophistication in selecting
modeling and analysis techniques most appropriate to their situations and addresses straightforward techniques, optional use of default parameters, and appropriate references to other
more sophisticated techniques.
Report/Paper Numbers:
Project 08-61
NCHRP 717
Scour at Bridge Foundations on Rock
Accession Number:
01371664
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167222.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_717.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://http://www.trb.org/main/blurbs/167222.aspx
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Order URL: http://worldcat.org/isbn/9780309214117
Abstract:
This report provides a methodology for estimating the time rate of scour and the design scour
depth for a bridge founded on rock, as well as design and construction guidelines for application
of the methodology. It will be of interest to hydraulic, bridge, and geotechnical engineers
responsible for designing bridge foundations on rock or maintenance engineers concerned
about existing bridges founded on erodible rock.
Supplemental Notes:
The appendices are available on the TRB website.
Report/Paper Numbers:
Project 24-29
NCHRP 718
Fatigue Loading and Design Methodology for High-Mast Lighting Towers
Accession Number:
01369762
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/167099.aspx
Availability:
Transportation Research Board Business Office
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Washington, DC 20001 USA
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Order URL: http://worldcat.org/isbn/9780309214032
Abstract:
This report provides criteria for the fatigue design of high-mast lighting towers (HMLTs). The
report also includes a series of proposed revisions with associated commentary to the fatigue
design provisions of the "AASHTO Standard Specifications for Structural Supports for Highway
Signs, Luminaires, and Traffic Signals." In addition, to ensure the fatigue design provisions are
properly implemented into practice, design examples are also provided. The material in this
report will be of immediate interest to highway design engineers.
Supplemental Notes:
Only Appendices A and B are published in this report. Other appendices (C through I) are
available on the TRB website and be found by searching on the title of the report.
Report/Paper Numbers:
Project 10-74
NCHRP 719
Calibration of Rutting Models for Structural and Mix Design
Accession Number:
01371665
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167220.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_719.pdf
Availability:
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Washington, DC 20001 USA
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Order URL: http://worldcat.org/isbn/9780309214063
Abstract:
This report proposes revisions to the "Mechanistic-Empirical Pavement Design Guide" (MEPDG)
and software to (1) incorporate three alternative rut-depth prediction models that rely on
repeated load (triaxial) permanent deformation or constant height testing to provide the requisite
input data, and (2) provide revised coefficients for the original and alternative rut-depth transfer
functions or prediction models derived from material properties measured in the laboratory and
pavement performance data. Thus, the report will be of immediate interest to engineers in
public- and private-sector organizations with responsibility for the structural design and analysis
of asphalt concrete pavements.
Report/Paper Numbers:
Project 9-30A
NCHRP 720
Estimating the Effects of Pavement Condition on Vehicle Operating Costs
Accession Number:
01375333
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/166904.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_720.pdf
Availability:
Transportation Research Board Business Office
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/166904.aspx
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Order URL: http://worldcat.org/isbn/9780309258210
Abstract:
This report presents models for estimating the effects of pavement condition on vehicle
operating costs. These models address fuel consumption, tire wear, and repair and
maintenance costs and are presented as computational software on the accompanying CDROM, CRP-CD-111, to facilitate use. The material contained in the report should be of
immediate interest to state pavement, construction, and maintenance engineers; vehicle fleet
managers; and those involved in pavement investment decision processes and financial
aspects of highway transportation.
Supplemental Notes:
The appendices are available at the TRB website provided on this document record.
Report/Paper Numbers:
Project 1-45
NCHRP 721
Fatigue Evaluation of Steel Bridges
Accession Number:
01376449
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167233.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_721.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167233.aspx
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Order URL: http://worldcat.org/isbn/9780309258265
Abstract:
This report provides proposed revisions to Section 7—Fatigue Evaluation of Steel Bridges of the
"AASHTO Manual for Bridge Evaluation" with detailed examples of the application of the
proposed revisions. The proposed revisions and examples were developed based on analytical
and experimental research conducted to improve existing methods to evaluate and assess the
serviceability of bridge structures for the fatigue limit state. The material in this report will be of
immediate interest to highway design engineers.
Report/Paper Numbers:
Project 12-81
NCHRP 722
Assessing Highway Tolling and Pricing Options and Impacts. Volume 1: DecisionMaking Framework
Accession Number:
01449980
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168012.aspx
Record URL:
http://onlinepubs.trb.org.../nchrp/nchrp_rpt_722v1.pdf
Availability:
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Order URL: http://worldcat.org/isbn/9780309258272
Abstract:
This report provides state departments of transportation (DOTs) and other transportation
agencies that are considering instituting or modifying user-based fees or tolling on segments of
their system with a decision-making framework and analytical tools that better describe likely
impacts on revenue generation and system performance. This report is presented in two
volumes. This volume, Volume 1, should be of immediate use to staff responsible for structuring
the policy-level evaluation of potential tolling and pricing solutions to examine their policy
implications, performance expectations, and financial impacts.
Report/Paper Numbers:
Project 08-57
NCHRP 722
Assessing Highway Tolling and Pricing Options and Impacts. Volume 2: Travel
Demand Forecasting Tools
Accession Number:
01449981
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168013.aspx
Record URL:
http://onlinepubs.trb.org.../nchrp/nchrp_rpt_722v2.pdf
Availability:
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Order URL: http://www.trb.org/Main/Blurbs/168013.aspx
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Order URL: http://worldcat.org/isbn/9780309258289
Abstract:
This report provides state departments of transportation (DOTs) and other transportation
agencies that are considering instituting or modifying user-based fees or tolling on segments of
their system with a decision-making framework and analytical tools that better describe likely
impacts on revenue generation and system performance. This report is presented in two
volumes. This volume, Volume 2, will provide staff who develop the forecasts of potential
revenue, transportation demand, and congestion and system performance with an in-depth
examination of the various analytical tools available for direct or adapted use.
Report/Paper Numbers:
Project 08-57
NCHRP 723
A Model for Identifying and Evaluating the Historic Significance of Post-World
War II Housing
Accession Number:
01444978
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167790.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_723.pdf
Availability:
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Order URL: http://worldcat.org/isbn/9780309258531
Abstract:
This report provides state departments of transportation (DOTs) with a model for identifying and
evaluating post-World War II (postwar) residences, a national historic context for this type of
development, and guidance on developing project-specific historic contexts. This information will
enable DOTs and the Federal Highway Administration (FHWA) to effectively and efficiently
comply with Section 106 of the National Historic Preservation Act and Section 4(f) of the
Department of Transportation Act, setting out a consistent and predictable approach for
identifying and evaluating postwar residential resources, thereby reducing costs and ensuring
timely project delivery. This report should be of immediate use to DOT cultural preservation staff
responsible for identifying and evaluating postwar residential development as part of the DOT's
project delivery process. The report, which contains numerous illustrations and photographic
examples of postwar housing, will also serve as an important reference document for cultural
preservation professionals.
Report/Paper Numbers:
Project 08-77
NCHRP 725
Guidelines for Analysis Methods and Construction Engineering of Curved and
Skewed Steel Girder Bridges
Accession Number:
01379865
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167646.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_725.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167646.aspx
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Order URL: http://worldcat.org/isbn/9780309258395
Abstract:
This report contains guidelines on the appropriate level of analysis needed to determine the
constructability and constructed geometry of curved and skewed steel girder bridges. Required
plan details and submittals are included in the guidelines. When appropriate in lieu of a 3D
analysis, the guidelines also introduce improvements to 1D and 2D analyses that require little
additional computational costs. The report will be of immediate interest to bridge and
construction engineers.
Report/Paper Numbers:
Project 12-79
NCHRP 726
A Guidebook for Nighttime Construction: Impacts on Safety, Quality, and
Productivity
Accession Number:
01396953
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167702.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_726.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167702.aspx
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Order URL: http://worldcat.org/isbn/9780309258470
Abstract:
This report provides a Guidebook of nighttime construction best practices concerning 1)
implementation of new or innovative ideas to convert necessary work activities to effective
nighttime production; 2) proven safety processes; 3) development of communication strategies
(both external and internal); and 4) work-zone illumination methods, including a list of new and
innovative lighting equipment with associated advantages and disadvantages. Also listed are
activities that may increase or decrease productivity when performed during the nighttime period,
as well as methods for conducting work-zone risk analysis planning and implementation for
different types of work. This information is presented as a hands-on, user-friendly resource with
hard-to-miss color icons that indicate key (not-to-forget) information, tips for proper use of the
information, and additional sources of useful information. This Guidebook will be of interest to
contractor and transportation agency personnel involved in night work, both in planning and in
on-site activities.
NCHRP 727
Effective Experiment Design and Data Analysis in Transportation Research
Accession Number:
01447509
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167861.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_727.pdf
Availability:
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Washington, DC 20001 USA
Order URL: www.trb.org/Main/Blurbs/167861.aspx
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Order URL: http://worldcat.org/isbn/9780309258494
Abstract:
This report describes the factors that should be considered in designing experiments and
presents 21 typical transportation examples illustrating the experiment design process, including
selection of appropriate statistical tests. The examples encompass a wide range of
transportation disciplines and statistical methods. This report will be very beneficial to anyone
with limited research experience needing to answer a question based on data (e.g., presenting
ozone concentrations in a region, determining whether a contractor's quality assurance/quality
control procedures are adequate, estimating the effect of automated enforcement on speeds,
monitoring trends in the condition of bridge superstructures, developing a user survey to
determine the impact of transit fare changes). The report is a companion to NCHRP CD-22,
"Scientific Approaches to Transportation Research," Volumes 1 and 2, which were developed in
NCHRP Project 20-45 and present detailed information on statistical methods. NCHRP CD-22 is
available at http://www.trb.org/Main/Blurbs/152122.aspx.
Report/Paper Numbers:
Project 20-71
NCHRP 728
Guidelines for Evaluating and Selecting Modifications to Existing Roadway Drainage
Infrastructure to Improve Water Quality in Ultra-Urban Areas
Accession Number:
01449982
Blurb URL:
http://www.trb.org/Main/Blurbs/168015.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_728.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/main/blurbs/168015.aspx
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Order URL: http://worldcat.org/isbn/9780309258609
Abstract:
This report provides guidelines to evaluate and select hydraulic modifications to existing
drainage infrastructure that will help mitigate potential impacts of highway runoff on receiving
waters. The guidelines are directed specifically at roadway facilities in dense urban areas that
can be particularly difficult and costly to retrofit because of space limitations, high pollutant
loadings, hydrologic flashiness, hydraulic constraints, legacy contamination, utility conflicts, and
other issues. They will assist transportation agencies in meeting regulatory requirements under
the Clean Water Act, National Pollutant Discharge Elimination System (NPDES) permits, Total
Maximum Daily Load (TMDL) allocations, endangered species protection, and watershed
protection initiatives. The guidelines are accompanied by a Microsoft® Excel-based design and
sizing tool on a CD-ROM, CRP-CD-116, bound into the back of this report. The tool generates
best management practice (BMP) performance curves that relate the performance and design
criteria for selected BMP controls described in the guidelines for each of the 15 U.S. rain zones.
One of the significant features of the tool is that it allows users to explore BMP performance and
retrofit sizing and design options based on user-selected design criteria and inputs. The
guidelines will be of particular interest to planners, designers, and engineers with a basic
understanding of the technical issues of BMP selection and design as applied to ultra-urban
retrofit settings.
NCHRP 729
Automated Enforcement for Speeding and Red Light Running
Accession Number:
01444860
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167757.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_729.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167757.aspx
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Order URL: http://worldcat.org/isbn/9780309258432
Abstract:
This report provides guidelines for the start-up and operation of automated enforcement
programs to reduce speeding and red light running in an effort to improve highway safety. The
guidelines are based on a comprehensive, national review of both ongoing and terminated
programs. This report will be of interest to highway traffic and safety engineers, enforcement
agencies, and elected officials.
Report/Paper Numbers:
Project 03-93
NCHRP 730
Design Guidance for Freeway Mainline Ramp Terminals
Accession Number:
01447510
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167516.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_730.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167516.aspx
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Order URL: http://worldcat.org/isbn/9780309258548
Abstract:
This report presents design guidance for freeway mainline ramp terminals based on current
driver and vehicle behavior. The report will be useful to freeway designers and those
responsible for developing design standards for freeway ramps. Special attention was given to
the behavior of tractor-trailers and the report includes several speed-distance curves for tractortrailers on grades up to 9% that could be useful in other applications (e.g., climbing lanes).
Report/Paper Numbers:
Project 15-31A
NCHRP 731
Guidelines for Timing Yellow and All-Red Intervals at Signalized Intersections
Accession Number:
01453403
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168017.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_731.pdf
Availability:
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Order URL: http://www.trb.org/Main/Blurbs/168017.aspx
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Order URL: http://worldcat.org/isbn/9780309258593
Abstract:
This report provides comprehensive and uniform guidelines for safe and efficient yellow change
and all-red clearance intervals at signalized intersections. These proposed guidelines provide a
framework that can be easily applied by state and local transportation agencies. This report will
be of interest to safety and traffic engineers.
Report/Paper Numbers:
Project 03-95
NCHRP 732
Methodologies to Estimate the Economic Impacts of Disruptions to the Goods Movement
System
Accession Number:
01449983
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/167969.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_732.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/167969.aspx
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Order URL: http://worldcat.org/isbn/9780309258562
Abstract:
This report describes the impacts of bottlenecks and interruptions to the flow of goods through
the nation's major freight corridors and intermodal connectors, the dynamics of that flow in
response to disruptions, and the full economic impact on public and private entities beyond just
the critical infrastructure and the carriers that depend on that flow. The report developed two
approaches to analyzing the economic impacts: (1) a high-level methodology (that provides the
user with "rules of thumb" that can be used to estimate the likely economic costs associated
with any type of disruption) based on the concept that the economic impact of any disruption
would depend primarily on the commodity characteristics, the extent and nature of the disruption,
and the costs associated with different elements of the cost structure; and (2) a more detailed
methodology that depends on a much higher level of detail and more sophisticated analysis of
the supply chain dynamic. This research will help to increase public understanding of the freight
transportation system and improve the nation's ability to rapidly reconfigure the goods
movement system to minimize disruptions.
NCHRP 733
High-Performance/High-Strength Lightweight Concrete for Bridge Girders and Decks
Accession Number:
01473753
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168612.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_733.pdf
Availability:
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Washington, DC 20001 USA
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Order URL: http://worldcat.org/isbn/9780309258883
Abstract:
This report presents proposed changes to the AASHTO LRFD bridge design and construction
specifications to address the use of lightweight concrete in bridge girders and decks. These
modified specifications will provide highway agencies with the information necessary to develop
comparable designs of lightweight and normal weight concrete bridge elements for use in
evaluating alternatives and selecting the alternative that will yield economic benefits. The
material contained in the report should be of immediate interest to state bridge engineers and
others involved in the design and construction of concrete bridges.
Report/Paper Numbers:
Project 18-15
NCHRP 734
Hydraulic Loss Coefficients for Culverts
Accession Number:
01457869
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168265.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_734.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/168265.aspx
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Order URL: http://worldcat.org/isbn/9780309258678
Abstract:
Traditional culvert applications were designed by determining the minimum culvert size that will
pass the specified design flood. In recent years, culvert performance objectives and designs
have been expanded to include other considerations such as improving fish and/or terrestrial
animal passage and rehabilitating old, deteriorated culverts. This project evaluated culvert
geometries associated with these new applications to develop the hydraulic relationships,
including loss coefficients. The report will be of interest to hydraulic engineers and
environmental staff.
Report/Paper Numbers:
Project 15-24
NCHRP 735
Long-Distance and Rural Travel Transferable Parameters for Statewide Travel
Forecasting Models
Accession Number:
01471852
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168389.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_735.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/168389.aspx
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Order URL: http://worldcat.org/isbn/9780309258791
Abstract:
This guidebook provides transferable parameters for both personal long-distance travel and
rural travel for statewide travel models, including applications and limitations. The guide is a
supplement to NCHRP Report 716: "Travel Demand Forecasting: Parameters and Techniques,"
which focused on urban travel. The report will be of broad interest to travel demand practitioners
at state departments of transportation (DOTs), metropolitan planning organizations (MPOs), and
consultants developing multistate and national travel forecasting models, statewide and intercity
passenger models, and large regional models, especially those covering areas of low-density
rural development patterns and undeveloped lands. Areas with a significant proportion of tourist
travel will also find this report to be useful in quantifying long-distance travel patterns.
Report/Paper Numbers:
Project 08-84
NCHRP 736
Resource Allocation Logic Framework to Meet Highway Asset Preservation
Accession Number:
01471853
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168342.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_736.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/168342.aspx
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Order URL: http://worldcat.org/isbn/9780309258715
Abstract:
This report presents a logic framework for allocating limited highway asset preservation funds
among competing demands to achieve high levels of system performance. The report also
presents a spreadsheet-based computational tool that implements the framework. The tool uses
linear programming optimization to allocate resources across asset classes or geographic
regions, subject to constraints that typically must be considered in such decisionmaking, to
achieve target asset performance or condition levels. Prototypical application scenarios and
case-study examples illustrate how transportation agency staff may use the framework to assist
resource allocation decisionmaking.
Report/Paper Numbers:
Project 14-21
NCHRP 741
Evaluation of Methodologies for Visual Impact Assessments
Accession Number:
01473258
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168536.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_741.pdf
Availability:
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Order URL: http://www.trb.org/Main/Blurbs/168536.aspx
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Order URL: http://worldcat.org/isbn/9780309258869
Abstract:
This report provides an evaluation of methodologies for visual impact assessment (VIA). The
report (a) evaluates state department of transportation (DOT) VIA procedures, methods, and
practices that satisfy or exceed National Environmental Policy Act (NEPA) and other
requirements; (2) documents the use of different methodologies and approaches used by DOTs;
(c) describes decision making frameworks used at state DOTs to undertake specific VIA
techniques for a given project; (d) documents proven successful methods; (e) describes best
practices illustrated by model case studies; and (f) documents promising new developments.
The report will be of broad interest to state, regional, and local planners, project development
staff, and environmental staff.
Report/Paper Numbers:
Project 25-33
NCHRP 742
Communicating the Value of Preservation: A Playbook
Accession Number:
01457890
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168322.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_742.pdf
Availability:
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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/168322.aspx
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Order URL: http://worldcat.org/isbn/9780309258708
Abstract:
This report presents guidance for communicating the value of highway system maintenance and
preservation. The guidance includes numerous examples and models that transportation
agency staff members can use to present—succinctly and persuasively to agency leadership,
elected officials, and the public—the case for allocating budgetary and other resources to
preserve and maintain the public's investment in highway infrastructure.
Report/Paper Numbers:
Project 14-24
NCHRP 743
Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality
Accession Number:
01475102
Blurb URL:
http://www.trb.org/Main/Blurbs/168592.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_743.pdf
Availability:
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Order URL: http://www.trb.org/Main/Blurbs/168592.aspx
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Order URL: http://worldcat.org/isbn/9780309258906
Abstract:
This report describes a proposed laboratory test method to predict the initial retroreflectivity of
pavement markings in the field based on the quality of the applied glass beads. Thus, the report
will be of immediate interest to state materials and maintenance engineers with responsibility for
specification and placement of pavement marking materials. The project team conducted a
combined laboratory and field experiment to develop, verify, and validate the proposed test
method. The laboratory experiment addressed the characterization of glass beads and identified
a drawdown test as a promising method to relate the laboratory retroreflectivity of glass beads
to initial pavement marking retroreflectivity. The field experiment successfully verified and
validated the laboratory results through a series of pilot- and full-scale pavement marking
applications. Finally, the variability of the drawdown test method was estimated through a
modified interlaboratory study. The study included five laboratories, which used the same set of
beads and the same paint to conduct the drawdown test independently. Analysis of the results
demonstrated that the test method is repeatable and reproducible. The report fully documents
the research; a proposed laboratory test method in AASHTO standard format is presented in
Chapter 5: Findings and Recommendations. In addition, the report includes Appendix A:
Explanation for Statistical Graphing.
Report/Paper Numbers:
Project 04-38
NCHRP 745
Left-Turn Accommodations at Unsignalized Intersections
Accession Number:
01478683
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/168803.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_745.pdf
Availability:
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Washington, DC 20001 USA
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Order URL: http://worldcat.org/isbn/9780309258982
Abstract:
This report presents guidance for the selection and design of left-turn accommodations at
unsignalized intersections. Eleven case studies of typical situations illustrate the use of the
guidance. The report will be useful to geometric designers and traffic engineers who deal with
unsignalized intersections.
Language:
English
NCHRP 751
Renewable Energy Guide for Highway Maintenance Facilities
Accession Number:
01483426
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/169047.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_751.pdf
Availability:
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Washington, DC 20001 United States
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Order URL: http://worldcat.org/isbn/9780309259118
Abstract:
This report presents a guide for the planning, design, and operation of new and retrofitted
highway maintenance facilities that are sustainable and energy efficient over their service lives
through the effective use of energy capture technologies. In this project, the term “highway
maintenance facility” was defined as a building used to garage, repair, and maintain vehicles
and equipment, with associated storage, shop, office, and other occupied spaces. The term
“energy capture technology” refers to the use of both active, renewable (such as wind, solar,
and ground-source) energy sources and passive (such as solar-thermal) building and site
modifications. The development of the guide comprised several major tasks. The research team
first conducted an extensive review of the worldwide literature on the use of renewable energy
technologies to heat and cool, light, and provide electrical power for maintenance facilities
operated by highway agencies as well as organizations such as transit agencies and the military.
The literature review was supported by a survey of state, local, and municipal highway agencies,
organizations with similar missions, and technology vendors to determine (1) energy capture
technologies currently employed at highway maintenance facilities, (2) existing or planned
highway maintenance facilities where energy capture technologies can be effectively employed,
and (3) strategies for financing projects incorporating renewable energy sources. Finally, the
survey results were used to identify case studies of the use of renewable energy technologies in
highway and non-highway maintenance facilities. The guide provides information specific to
regional and facility-functional requirements and is suitable for possible adoption by the
American Association of State Highway and Transportation Officials (AASHTO). It provides an
extensive set of case studies illustrative of the use, benefits, and costs of renewable energy
technologies in a variety of geographic and climatic regions in the United States. The guide fully
documents the results of the research and includes an appendix for estimating the costs and
capabilities of several renewable energy sources and a glossary of terms.
Report/Paper Numbers:
Project 20-85
NCHRP 752
Improved Mix Design, Evaluation, and Materials Management Practices for Hot Mix
Asphalt with High Reclaimed Asphalt Pavement Content
Accession Number:
01484798
Blurb URL:
http://www.trb.org/Main/Blurbs/169140.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_752.pdf
Availability:
Transportation Research Board Business Office
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Washington, DC 20001 USA
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Order URL: http://worldcat.org/isbn/9780309259132
Abstract:
The objectives of this project were to (1) develop a mix design and evaluation procedure that
provides satisfactory long-term performance for asphalt mixtures containing high reclaimed
asphalt pavement (RAP) contents—in the range of 25 to 50% or greater—and (2) propose
changes to existing American Association of State Highway and Transportation Officials
(AASHTO) standards to adapt them to the design of high RAP content mixtures. The project
team conducted a comprehensive laboratory experiment to answer basic questions about
preparing and characterizing RAP materials for mix designs. A series of mix designs was then
prepared with materials from four different parts of the United States with different RAP contents
and different virgin binders. Those mix designs were evaluated against standard Superpave
criteria and a set of performance-related tests to further assess the mix designs for their
susceptibility to common forms of distress, particularly fatigue cracking, low-temperature
cracking, and moisture damage. A concurrent effort developed a set of best practices for RAP
management in field production and construction from information obtained through a literature
review, surveys of current practices in the industry, discussions with numerous contractor
quality control (QC) personnel, and analysis of contractor stockpile QC data from across the
United States The research found that only minor, though important, revisions to the current
AASHTO standards for asphalt mix design, AASHTO R 35 (Superpave Volumetric Design for
Hot Mix Asphalt) and M 323 (Superpave Volumetric Mix Design), were needed to adapt them for
the successful design of high RAP content asphalt mixtures. As expected, high RAP contents
substantially increased the dynamic modulus of the asphalt mixtures as well as their rutting
resistance as measured by the confined flow number test. Tensile strength ratios of high RAP
content mixtures as measured by AASHTO T 283 were comparable to those of control mixtures
without RAP, indicating similar moisture damage susceptibilities. As might be expected,
compared to control mixtures without RAP, the high RAP content mixtures generally had lower
fracture energies at test temperatures used to evaluate susceptibility to fatigue and lowtemperature cracking. This finding suggests that careful attention should be given to the
selection of the performance grade of the virgin binder used in high RAP content mixtures to
minimize any long-term risk of cracking distress.
Report/Paper Numbers:
Project 09-46
NCHRP 753
A Pre-Event Recovery Planning Guide for Transportation
Accession Number:
01489142
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/169296.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_753.pdf
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Order URL: http://worldcat.org/isbn/9780309283380
Abstract:
This report provides an overview of what can be done to prepare for the recovery of
transportation critical infrastructure. Principles and processes based on federal guidance,
effective practices, and lessons from case studies are provided to guide transportation owners
and operators in their efforts to plan for recovery prior to the occurrence of an event that impacts
transportation systems. Tools and resources are included to assist in both pre-planning for
recovery and implementing recovery after an event. The Guide is intended to provide a single
resource for understanding the principles and processes to be used for pre-event recovery
planning for transportation infrastructure. In addition to the principles and processes, the Guide
contains checklists, decision support tools, and resources to support pre-event recovery
planning. The Guide will be of interest to transportation infrastructure owners/operators,
transportations planners, and practitioners at the state and local levels.
Report/Paper Numbers:
Project 20-59(33)
NCHRP 771
Strategies to Optimize Real Property Acquisition, Relocation Assistance, and Property
Management Practices
Accession Number:
01543645
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171624.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_771.pdf
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Order URL: http://worldcat.org/isbn/9780309308106
Abstract:
Inefficiencies in the process to acquire and manage real property have a significant impact on
the ability of transportation agencies to develop and deliver transportation projects effectively.
Acquisition of real property is frequently on the critical path of transportation projects. Delays in
acquiring real property are one of the main reasons (along with environmental reviews and utility
relocations) for project delays and cost overruns. Current right-of-way practice and procedural
manuals are the products of forty years of statutes, case law, regulations, management styles,
and best practices, brought into compliance with the requirements in the Uniform Relocation
Assistance and Real Property Acquisition Policies Act of 1970 (Uniform Act). State procedures
vary widely because of differences in state laws. Local agencies are required to follow state
DOT procedural manuals when they use state or federal funding. Questions arise as new staff
try to understand the reason or underlying basis for requirements. Contractors and consultants
face a wide array of requirements and forms among the various states. This report provides (a)
improved, integrated real property procedures and business practices in the project
development and delivery process; and (b) suggestions to improve property management
practices. An online survey, follow-up interviews, and a peer exchange meeting were used to
determine which business practices are critical to the mission of the project development and
delivery process and real property management. The research compared a typical right-of-way
business model currently in compliance with the Uniform Act and federal regulations with an
improved model based upon an objective analysis of its key elements. The research produced
(a) an integrated model of the transportation project development and delivery process,
including a real property acquisition and relocation assistance model in accordance with 42
U.S.C. 4601 et seq.; (b) a reference real property acquisition and relocation assistance work
schedule; and (c) a discussion of issues and challenges affecting project development and
delivery that typically involve real property components, as well as strategies to address those
issues and challenges. Standalone versions of the integrated model and reference work
schedule were also developed and are included with this report on an attached CD-ROM (CRPCD 154) or on the Transportation Research Board’s website.
Report/Paper Numbers:
Project 20-84
NCHRP 773
Capacity Modeling Guidebook for Shared-Use Passenger and Freight Rail Operations
Accession Number:
01545942
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171662.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_773.pdf
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Order URL: http://worldcat.org/isbn/9780309308168
Abstract:
This report provides technical guidance for state departments of transportation (DOTs) who are
starting or expanding passenger rail service on privately-owned and shared-use rail corridors.
The guidance is designed to aid in the DOTs’ understanding of the methods host railroads use
to calibrate and apply capacity models to determine if adequate capacity exists to support new
or increased passenger rail service or if infrastructure improvements may be necessary. A
shared understanding of these methods will aid all parties—including state DOTs—in the
negotiation of service outcome agreements. After an introductory chapter, the individual
chapters present a synthesis of stakeholder input, analytical approaches to line capacity in
shared-use corridors, best practices, and a discussion of recent and ongoing planning for the
Chicago-Saint Louis high speed rail implementation on the Union Pacific Railroad and Canadian
National Railway line. This report should be of immediate use to transportation professionals
charged with the responsibility for planning passenger rail service and negotiating sharedcorridor service agreements with host railroads.
Report/Paper Numbers:
Project 08-86
NCHRP 774
Superelevation Criteria for Sharp Horizontal Curves on Steep Grades
Accession Number:
01537320
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171270.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_774.pdf
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Order URL: http://worldcat.org/isbn/9780309307901
Abstract:
Sharp, horizontal curves on steep downgrades represent a potential safety concern for vehicles,
especially heavy vehicles. Examples where this combination may occur are interchange ramp
movements, curves on mountainous roads, or high-speed downgrade curves on controlledaccess roadways. At these locations, the complicating factors of grade, pavement cross slope,
and pavement friction fully tax the driver’s ability to provide correct vehicle positioning without
compromising control of the vehicle. Superelevation criteria, horizontal curvature, and other
associated geometric criteria needed to be developed for situations where steep grades are
located on sharp horizontal curves. This report provides superelevation criteria for horizontal
curves on steep grades. A series of field studies and vehicle dynamics simulations were
undertaken to investigate combinations of horizontal curve and vertical grade design. Three
classes of passenger vehicles and three classes of trucks were considered for safety analysis.
The report provides design guidance based on the analyses for sharp horizontal curves on
steep grades.
Report/Paper Numbers:
Project 15-39
NCHRP 776
Bridge System Safety and Redundancy
Accession Number:
01528683
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/170901.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_776.pdf
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Order URL: http://worldcat.org/isbn/9780309284080
National Technical Information Service
5301 Shawnee Road
Alexandria, VA 22312 United States
Order Number: PB2014-107596
Abstract:
This report develops a method to calibrate system factors that can be applied during the design
and load capacity evaluation of highway bridges to account for bridge redundancy and system
safety. The proposed system factors can be used during the design and safety assessment of
bridges subjected to distributed lateral load being evaluated using the displacement-based
approach specified in the AASHTO Guide Specifications for LRFD Seismic Bridge Design or the
traditional force-based approach. Also, the report presents system factors calibrated for
application with bridge systems subjected to vertical vehicular loads.
Report/Paper Numbers:
Project 12-86
NCHRP 778
Bridge Stormwater Runoff Analysis and Treatment Options
Accession Number:
01534265
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/170652.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_778.pdf
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Order URL: http://worldcat.org/isbn/9780309284158
Abstract:
This report presents information and an analysis process for identifying strategies for
management of stormwater runoff from highway bridges. Departments of transportation and
other public agencies responsible for managing stormwater runoff to reduce pollution loads in
receiving waters may use this information and process to assist their selection of a costeffective strategy for a particular bridge. The report will be helpful to designers and managers
who must identify and assess the merits of stormwater management practices. Individual
chapters address: the state of the practice; assessment procedures; stormwater and other
source control practices to consider for all bridges; stormwater treatment controls for bridges;
and a best management practices evaluation tool.
Report/Paper Numbers:
Project 25-42
NCHRP 779
Field Performance of Warm Mix Asphalt Technologies
Accession Number:
01541199
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171480.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_779.pdf
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Order URL: http://worldcat.org/isbn/9780309308038
Abstract:
This report compares material properties and field performance of warm mix asphalt (WMA) and
control hot mix asphalt (HMA) pavement sections constructed at 14 locations across the United
States between 2006 and 2010. The specific objectives of the project were to (1) compare the
short-term performance of WMA and control HMA pavements, (2) examine relationships among
engineering properties of WMA binders and mixes and the field performance of pavements
constructed with WMA technologies, (3) compare production and laydown practices between
WMA and HMA pavements, and (4) provide relative emissions measurements of WMA
technologies and conventional HMA technologies. Performance and material property data were
obtained from 14 field projects. Each of the 14 projects included single- or multiple-WMA
technology pavement sections and an HMA control section. A total of 12 WMA technologies
were investigated. All projects used “drop in” WMA mix designs where the WMA technology was
used with an existing HMA mix design with no significant changes to the binder content or other
aspects of the mix design. Except for the reduced mixing and compaction temperatures for
WMA, there were no substantial differences in the production and laydown practices of WMA
and HMA. In-service performance of WMA and HMA in all projects was virtually identical, with
little or no rutting, no evidence of moisture damage, and very little indication of transverse or
longitudinal cracking. Energy use, plant and paver emissions, and worker exposure to fumes
were extensively measured at three multiple-WMA technology projects. Compared to HMA, the
reduced temperatures used in WMA production and laydown yielded lower energy consumption
and emissions and reduced worker exposure to respirable fumes. Overall, then, no penalties
and some potential benefits were observed in the short term when WMA replaced HMA. The
key finding of laboratory testing of WMA binders and mixtures from the projects sampled at
construction was the expected lower stiffness of the WMA materials that would have potential
effects on pavement rutting and cracking. However, the equivalent performance of the WMA
and HMA pavement sections over several years of service suggests that these differences in
material properties, when present, were not great enough to affect the relative performances of
HMA and WMA. This report fully documents the research in two parts bound in one report. Part
1 includes an appendix on Falling Weight Deflectometer Testing; Part 2 includes an appendix
on Documenting Emissions and Energy Reductions of WMA and Conventional HMA During
Plant and Paving Operations.
Report/Paper Numbers:
Project 9-47A
NCHRP 780
Design Guidance for Intersection Auxiliary Lanes
Accession Number:
01537696
Blurb URL:
http://www.trb.org/Main/Blurbs/171328.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_780.pdf
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Order URL: http://worldcat.org/isbn/9780309284325
Abstract:
A large proportion of crashes occur at intersections and auxiliary turn lanes are a key
countermeasure for addressing such crashes. Auxiliary lanes can also be used to increase
capacity and improve operations at an intersection. The design components of a traditional
auxiliary turn lane consist of the length needed to store an appropriate number of waiting
vehicles, a vehicle deceleration area, and the taper needed to develop the full lane width. Offset
and indirect turn lanes and other types of auxiliary lanes (e.g., acceleration lanes) have similar
components. The guidance and practice used throughout the United States for auxiliary lane
designs and application vary by intersection location (e.g., rural or urban), traffic control (e.g.,
stop-control or signal-control), and lane type (e.g., right- or left-turn). AASHTO’s A Policy on
Geometric Design of Highways and Streets (the Green Book) contains limited criteria for
geometric design of auxiliary lanes at intersections. This report expands on that guidance,
particularly regarding bypass lanes, channelized right-turn lanes, deceleration and taper length,
design and capacity of multiple left-turn lanes, and alternative intersection designs. In National
Cooperative Highway Research Program (NCHRP) Project 03-102, the Texas A&M
Transportation Institute reviewed existing literature and ongoing research projects and identified
issues meriting further study to validate, enhance, and expand current Green Book guidance.
Field studies were conducted to assess the operation of double left-turn lanes and deceleration
lanes. The research team then developed practical guidance for designers on auxiliary lanes,
including recommendations for improving the Green Book. This report will be useful in updating
agency design manuals and to those designing intersections.
NCHRP 781
A Debris Management Handbook for State and Local DOTs and Departments of Public
Works
Accession Number:
01547704
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171727.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_781.pdf
Availability:
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Order URL: http://www.trb.org/Main/Blurbs/171727.aspx
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Order URL: http://worldcat.org/isbn/9780309308113
Abstract:
Much of the debris from any incident—whether a traffic incident, collapse of aging infrastructure,
or major disasters such as a hurricane or tornado—falls on or is pushed onto roads. These
roads must be cleared rapidly because they are part of the planned network of emergency
routes to bring in first responders, as well as to provide the necessary mobility to get the injured
to appropriate medical care or to shelters. In the aftermath of an incident, it is essential to
restore the transportation system and other public utilities as quickly as possible. This involves
clearing debris and repairing, replacing, or restoring critical transportation infrastructure. This
report provides background and advice to enable a community or agency to better prepare for
and respond to disaster-related debris issues. The subjects addressed within the handbook
range from development of a plan to final debris disposal and operational closure. It is
organized by phase of the debris management cycle, including policy, planning, contracts,
segregation, monitoring, site selection, removal, disposal, and reimbursement, as well as
hazard-specific considerations. The handbook features several case studies drawing on the
experience of local, state, and federal debris managers, offering real-world insight into efficient
debris management operations. This handbook will be of interest to community political leaders,
state DOTs, local public works agencies, and facilities managers. In addition to the handbook, a
methodology report and a PowerPoint presentation describing the entire project are available on
the TRB website (www.trb.org).
NCHRP 782
Proposed Guideline for Reliability-Based Bridge Inspection Practices
Accession Number:
01540894
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171448.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_782.pdf
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Order URL: http://worldcat.org/isbn/9780309307918
Abstract:
This report presents a proposed guideline for reliability-based bridge inspection practices and
provides two case studies of the application of the proposed Guideline. The guideline describes
a methodology to develop a risk-based approach for determining the bridge inspection interval
according to the requirements in the “Moving Ahead for Progress in the 21st Century Act (MAP21)” legislation. The goal of the methodology is to improve the safety and reliability of bridges by
focusing inspection efforts where most needed and optimizing the use of resources. The report
includes two parts: Part I—Proposed Guideline for Reliability-Based Bridge Inspection Practices
and Part II—Final Research Report: Developing Reliability-Based Inspection Practices that
documents the entire research effort. The material in this report will be of immediate interest to
bridge engineers.
Report/Paper Numbers:
Project 12-82 (01)
NCHRP 783
Evaluation of the 13 Controlling Criteria for Geometric Design
Accession Number:
01538631
Blurb URL:
http://www.trb.org/Main/Blurbs/171358.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_783.pdf
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Order URL: http://worldcat.org/isbn/9780309307963
Abstract:
This report describes the impact of the controlling roadway design criteria on safety and
operations for urban and rural roads. In 1985, the FHWA designated 13 specific design
elements as controlling criteria for roadway design. The 13 controlling criteria are (1) design
speed, (2) lane width, (3) shoulder width, (4) bridge width, (5) structural capacity, (6) horizontal
alignment, (7) vertical alignment, (8) grade, (9) stopping sight distance, (10) cross slope, (11)
superelevation, (12) vertical clearance, and (13) horizontal clearance. Federally assisted
highway construction and reconstruction projects must meet the established design criteria for
these elements, or a formal design exception must be prepared and approved. Different
procedures apply to rehabilitation projects, but these design elements are still key
considerations in design. Since their designation, the 13 controlling criteria and their application
have not been reconsidered as new knowledge has been gained about the relationships
between geometric design elements and safety and operations. In this research project, the
research team investigated what is known about the safety and operational effects of the 13
controlling and other important geometric design criteria. Several small studies were done to
augment the information found in the literature. This information was used to assess the
sensitivity of safety and operations to design decisions for these criteria for different types of
roads. The research also addressed how to reduce confusion related to the definitions of the
controlling criteria. The use of the controlling criteria in design exception processes was also
explored, including through interviews with state department of transportation (DOT) personnel.
This report will be useful to geometric designers and those responsible for reviewing designs,
particularly in agencies that are transitioning away from “standards-based design.”
NCHRP 785
Performance-Based Analysis of Geometric Design of Highways and Streets
Accession Number:
01539939
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171431.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_785.pdf
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Order URL: http://worldcat.org/isbn/9780309308007
Abstract:
For both new construction and reconstruction of highways and streets, stakeholders and
decision makers increasingly want reasonable measures of the effect of geometric design
decisions on the facility’s performance for all of its users. Although the expected performance of
the facility is only one of the factors that must be considered in designing a highway or street, a
better understanding of the expected performance should result in better decisions during the
design process. This report presents ways to incorporate performance-based analysis into the
project development process. This process framework begins with setting desired project
multimodal outcomes and design controls. Geometric design decisions that can influence those
outcomes are identified as well as analysis tools that can be used to estimate the impacts of
those decisions. The report includes six project examples illustrating how this framework can be
applied to actual projects. The report will be useful to geometric designers in making informed
decisions about the tradeoffs inherent in design.
Report/Paper Numbers:
Project 15-34A
NCHRP 786
Assessing Productivity Impacts of Transportation Investments
Accession Number:
01538597
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171356.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_786.pdf
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Order URL: http://worldcat.org/isbn/9780309284257
Abstract:
This report presents a methodology for analyzing productivity effects of transportation system
improvements. The analysis is intended to inform decisionmakers—for example, regional
transportation planning agencies, local-government agencies, and elected officials—making
choices among alternative investments that may yield a variety of benefits. The methodology
involves first screening investments to identify those for which a relatively simplified analysis
may be helpful; those requiring more extensive analysis require application of advanced
regional economic models. The guidance addresses data needs, availability, and sources to
support the analysis; agency staff capabilities; and audiences for information on productivity
improvements. This report will be useful to department of transportation staff and others
responsible for project evaluation and presentation of evaluation results to decisionmakers.
Report/Paper Numbers:
Project 02-24
NCHRP 787
Guide for Design Management on Design-Build and Construction Manager/General
Contractor Projects
Accession Number:
01541210
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171479.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_787.pdf
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Order URL: http://worldcat.org/isbn/9780309308052
Abstract:
While the traditional design-bid-build (DBB) approach to project delivery remains prevalent
among state departments of transportation (DOTs) and other owners of transportation facilities,
some agencies have been selectively adopting alternative delivery methods that increase
collaboration among the owner, designer, and constructor. Under the design-build (D-B)
process, for example, the designer and constructor act as a unified team to deliver a completed
project at a set price. Under a construction manager-at-risk (CMR) process, designer and
constructor are engaged separately by the owner (as is the case under DBB), but the
constructor is involved from the earliest stages of the design process; the designer and
constructor are expected to work collaboratively to deliver a project that meets the owner’s
requirements. Some agencies have adopted the term Construction Manager/ General
Contractor (CM/GC) for a method that is generally similar to CMR but has more effectively
facilitated the reallocation of risk among owner, constructor, and designer; and does not restrict
the primary contractor’s performance of work tasks. (As used in this research, CM/GC was
understood to include CMR.) Experience has shown that agency policies used to develop and
administer traditional design contracts (that is, under DBB) are inadequate for these alternative
delivery methods. The objective of this project was to develop a guide to effective designmanagement practices for owners using CM/GC or D-B. The research team reviewed recent
experiences of DOTs and other public agencies regarding design management practices used
on projects developed under CM/GC, D-B, and similar methods for project delivery. The team
also investigated relevant experience from other construction industry segments. Considering
such issues as liability and responsibility in CM/GC and D-B project development and measures
of effectiveness for design management, the team developed a framework characterizing
principal areas where owners’ design management practices under CM/GC and D-B project
delivery processes are likely to influence project success and specific guidance for successful
design management. The product is a guidebook for state DOTs and other transportation
agencies on design management under CM/GC and D-B project delivery. The guidance is
supplemented by case studies of projects successfully developed by several DOTs. This
document is written to assist agency staff responsible for management oversight of facilities
developed using CM/ GC and D-B and other such alternative procurement strategies.
Report/Paper Numbers:
Project 15-46
NCHRP 788
Guide for Effective Tribal Crash Reporting
Accession Number:
01543131
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171540.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_788.pdf
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Order URL: http://worldcat.org/isbn/9780309308076
Abstract:
This guidebook presents guidance for state agencies and tribal leaders in effective crash
reporting. The guidebook is developed based on best practices, success stories, lessons
learned, published literature, and data from tribes and states that were involved in the data
collection and analysis phase of this project. Part 1 of the guidebook provides self-assessment
tools for state agencies and tribes. The self-assessment tools are designed to provide a quick
assessment of the effectiveness of existing crash data collection and management, and the
current level of communication and collaboration between tribes and state agencies. Part 2 of
the guidebook provides information to both states and tribes to help identify solutions to issues
associated with (1) establishing and maintaining communication and relationship between tribes
and states; (2) building tribal crash data collection system; (3) implementing state-tribal crash
data sharing; and (4) improving tribal traffic safety with crash data. Part 3 contains reference
and source materials. The guide is accompanied by a CD (CRP-CD-155) containing a
supplemental report documenting the research approach and findings, as well as color PDF
copies of case study flyers meant to be used as handouts and reference material at meeting,
conferences, and events. The CD also contains a double-sided three-fold flyer designed to
promote the use of this guidebook via graphical presentation of function and summary of the
guide. This guidebook and accompanying CD will provide valuable knowledge to both tribal law
enforcement and state transportation agencies to better understand the extent and causes of
crashes on tribal lands in order to develop more effective safety programs and countermeasures.
NCHRP 789
Characterization of Cementitiously Stabilized Layers for Use in Pavement Design and
Analysis
Accession Number:
01545329
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171659.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_789.pdf
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Order URL: http://worldcat.org/isbn/9780309308137
Abstract:
This report presents information on the characterization of cementitiously stabilized layers and
the properties that influence pavement performance. It also contains recommended
performance-related procedures for characterizing these layers and performance-prediction
models for incorporation into the mechanistic–empirical pavement analysis methods. Individual
chapters highlight pavement distresses of hot-mix asphalt pavements and concrete pavements,
laboratory tests and model development, and model calibration. The material contained in the
report will be of immediate interest to state materials, pavement, and construction engineers
and others involved in the different aspects of pavement design and construction.
Report/Paper Numbers:
Project 4-36
NCHRP 790
Factors Contributing to Median Encroachments and Cross-Median Crashes
Accession Number:
01539854
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171398.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_790.pdf
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Order URL: http://worldcat.org/isbn/9780309284264
Abstract:
Previous studies of contributory factors associated with cross-median crashes have typically
focused on median width and average daily traffic (ADT). A few studies have looked at the
influence of geometry and cross-sectional elements. These studies did not explore many other
design and operational factors that may contribute to cross-median crash frequency or severity
(e.g., interchange ramps, interchange spacing, mixture of vehicle types, peak-period volumes,
peak-period duration, land use, access control, driver workload, posted speed, or presence of
speed transition zones). All median-related incidents begin with a median encroachment.
Reducing median encroachments will reduce both cross-median crashes and fixed-object
crashes in the median. Consequently, analyzing median encroachments should provide
additional insight into the causes of cross-median crashes. There is also a knowledge gap
regarding countermeasures appropriate for the various factors contributing to median
encroachments and cross-median crashes. Although installing a barrier will greatly reduce
cross-median crashes, it will also increase fixed-object crashes and the crash risk of
maintenance personnel. Other countermeasures besides barriers exist, and knowing which
ones effectively address the contributory factors on a highway will allow an engineer to develop
a more effective design. This report identifies design and operational factors that contribute to
the frequency and severity of median encroachments and cross-median crashes. It also
identifies countermeasures for addressing those contributory factors. For this project, the
research team reviewed the literature on median encroachments and cross-median crashes.
Based on a survey of states, Canadian provinces, and turnpike/toll road authorities, the team
compiled a list of design and operational factors likely to contribute to median encroachments
and cross-median crashes. The research team then collected data to determine the relative
contribution of each of the factors to median encroachments and cross-median crashes.
Appendix D of the report provides recommended guidelines for reducing the frequency and
severity of median-related crashes. This material is designed to be easily incorporated into a
transportation agency’s design manual.
Report/Paper Numbers:
Project 17-44
NCHRP 791
Supplemental Guidance on the Application of FHWA’s Traffic Noise Model (TNM)
Accession Number:
01539940
Blurb URL:
http://www.trb.org/Main/Blurbs/171433.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_791.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/171433.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309307970
Abstract:
Beginning in the 1970s, the Federal Highway Administration (FHWA) developed and improved a
series of computerized noise prediction models to aid states in complying with FHWA’s noise
policies and regulations. FHWA’s Transportation Noise Model is a computer program used for
predicting noise levels and therefore impacts in the vicinity of highways, and it uses advances in
personal computer hardware and software to improve upon the accuracy and ease of modeling
highway noise, including the design of effective, cost-efficient highway noise barriers. FHWA
has provided substantial guidance for the routine application of TNM but scenarios exist for
which there is no technical guidance. Out of necessity and without technical guidance, TNM
users have independently developed techniques to assemble and input data into the TNM to
analyze these scenarios. Typically these techniques have not been validated with field
measurements, and the accuracy of their results is unknown. In this project, best practices and
supplemental existing guidance were identified on applying TNM to accurately, consistently, and
efficiently model structure-reflected noise; bridge expansion joints; signalized interchanges;
intersections; area sources (e.g., weigh stations, park and ride lots, toll facilities, and service
plazas); median barriers; and roundabouts. This research determined the sensitivity and
accuracy of methods to model multilane highways, rows of buildings, topography, ground zones,
and tree zones, and identified best practices for input parameters. The research also
synthesized the state of practice for analyzing the effects of wind direction and temperature
inversion on sound propagation. The report is organized by scenario, and experienced
transportation analysts, modelers, and designers should find this guidance immediately useful in
using TNM to model noise impacts under these scenarios.
NCHRP 792
Long-Term Performance and Life-Cycle Costs of Stormwater Best Management Practices
Accession Number:
01541035
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171471.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_792.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/171471.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308021
Abstract:
A wide range of treatment controls (commonly known as “best management practices” or BMPs)
have been developed to manage stormwater. Treatment BMPs use various processes to
mitigate the impacts of pollutants and altered hydrology; for example, by attenuating the flow or
reducing the volume of stormwater or by reducing pollutants with physical, biological, or
chemical processes. This report provides information on long-term performance and life-cycle
costs for highway-related stormwater BMPs. Information was gathered via literature review,
survey of departments of transportation (DOTs), and interviews with practitioners. Information
for treatment BMPs was derived from DOT studies and the International BMP Database. The
International BMP Database contains performance records for treatment BMP evaluations
throughout the United States. The research included conducting a large number of computer
simulations using the U.S. EPA’s Stormwater Management Model (SWMM) to quantify runoff
volume reduction through the BMP. The report is accompanied by a CD-ROM (CRP-CD-153)
containing a BMP evaluation tool in a spreadsheet format as a computational aid that provides
average annual performance and whole life costs for treatment BMPs. A guide (Planning Tool
Handbook) is provided as Appendix F to quickly orient the user to the basic functions of the tool
provided on the CD-ROM. The report will be of interest to state DOT highway design and
environmental practitioners.
Report/Paper Numbers:
Project 25-40
NCHRP 793
Incorporating Transportation Security Awareness into Routine State DOT Operations and
Training
Accession Number:
01543133
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171543.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_793.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/171543.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308069
Abstract:
This report highlights the importance of security awareness for all state department of
transportation employees and contractors. The report outlines a flexible “campaign” approach
providing techniques to integrate all-hazards security awareness concepts and reminders into
routine state DOT operations, maintenance, and training. Information obtained through a
literature review, survey, and interviews was used to develop the guide. Section 1 provides a
brief introduction to transportation security and the current role of the state DOTs in security.
Security awareness is defined and differentiated from security training. The section also
presents the importance of security awareness for all transportation executives, employees, and
contractors. Section 2 addresses issues of organizational readiness and includes five key
“Questions to Ask” to ensure that an agency is ready to have and support an effective security
awareness program. Section 3 identifies the core components of a security awareness
campaign, utilizing examples from current practices. The section includes general messages for
all employees and suggested messages and delivery methods for operations and maintenance
staff. Section 4 provides methods for promoting security awareness within a state DOT that can
be relatively inexpensive to implement. Additional material is provided in the Appendices: an
overview of current training available with links to training resources and training courses, a
contact list for training organizations, and a directory of resources relevant to transportation
security. In addition to the guide, a methodology report and a PowerPoint presentation
describing the entire project are available on the TRB website (www.trb.org). This report should
be helpful for state DOTs to improve the security of transportation systems within existing
resource and budgetary constraints. Information contained in the report may also be valuable
for transportation training organizations.
Report/Paper Numbers:
Project 20-59(43)
NCHRP 794
Median Cross-Section Design for Rural Divided Highways
Accession Number:
01551879
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171894.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_794.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/171894.aspx
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Order URL: http://worldcat.org/isbn/9780309308199
Abstract:
This report presents guidelines for designing typical cross-sections for medians on new and
existing rural freeways and divided highways. The report examines the interrelationships
between median width, median slope, and the use of median barrier on crash risk and severity.
The AASHTO Policy on Geometric Design of Highways and Streets contains general median
width and median side-slope design guidance that has remained unchanged for many years.
However, changes have occurred in the vehicle fleet, travel speeds, and traffic volumes that
warrant further examination of this guidance. Concern with rollover crashes has caused many
state departments of transportation (DOTs) to flatten their depressed medians. More recently,
highly visible cross-median crashes have caused many state DOTs to increase their use of
median barrier beyond the recommendations in the AASHTO Roadside Design Guide. There is
speculation that flatter medians have contributed to the cross-median problem, but the data do
not present a clear picture. Installation of median barrier reduces the number of cross-median
crashes but increases the number of fixed-object crashes. Understanding how different median
cross-section designs influence different types of crashes is vital in making safe and costeffective decisions for state design standards and for project design. In National Cooperative
Highway Research Program (NCHRP) Project 22-21, the research team updated the survey of
state practice developed in NCHRP Project 17-14, including the types of barrier being installed
and the policies for their installation. The research team also compiled information on typical
median cross-sections for new construction and reconstruction projects. Based on the literature,
the researchers identified design, traffic, and human factors that influence median and roadside
safety. The research team then collected field data to assess the safety and cost-effectiveness
of various median cross-section designs. Simulations of median encroachments were also
made to evaluate the contributions of the various factors to cross-median crashes. This report
should be useful to designers and safety analysts, particularly those responsible for agency
standards.
Report/Paper Numbers:
Project 22-21A
NCHRP 795
Design Methods for In-Stream Flow Control Structures
Accession Number:
01549549
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171759.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_795.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/171759.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308212
Abstract:
This report presents design guidelines for in-stream flow control structures that are often used to
limit lateral migration and reduce bank erosion. The guidelines include a description of
conditions under which in-stream flow control structures are either successful or not effective in
providing protection against erosion and scour and in performing applicable habitat restoration
functions. Unlike rip-rap, which strengthens the bank to withstand the applied hydrodynamic
forces, in-stream flow control structures alter the stream-flow patterns to shift the high-velocity
thread away from the bank. This report will be valuable to hydraulic engineers by facilitating the
use of an alternative method to reduce stream-bank erosion and scour.
Report/Paper Numbers:
Project 24-33
NCHRP 796
Development and Calibration of AASHTO LRFD Specifications for Structural Supports for
Highway Signs, Luminaires, and Traffic Signals
Accession Number:
01547703
Record Type:
Monograph
Blurb URL:
http://www.trb.org/Main/Blurbs/171725.aspx
Record URL:
http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_796.pdf
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/171725.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308182
Abstract:
This report presents proposed AASHTO load and resistance factor design (LRFD) specifications
for structural supports for highway signs, luminaires, and traffic signals. The proposed
specifications are arranged in three divisions: (1) design according to LRFD methodology; (2)
construction, including material specifications, fabrication, and installation; and (3) asset
management, including inventory, inspection, and maintenance. In addition, the report provides
details regarding the reliability calibration process and results. Sixteen comprehensive design
examples were developed to illustrate the application of the new specifications. The report
includes the Research Report, which documents the entire research effort, and the Calibration
Report (i.e., Appendix A). Appendix B: AASHTO LRFD Specifications will be published by
AASHTO. Other appendices are not published but are available on the TRB website. These
appendices are titled as follows: Appendix C: Design Examples; Appendix D: Survey Results;
and Appendix E: Fatigue Resistance Comparisons.
Report/Paper Numbers:
Project 10-80
NCHRP 799
Management Guide to Intellectual Property for State Departments of
Transportation
Management Guide to Intellectual Property for State Departments of Transportation
Accession Number:
01557113
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172260.aspx
Availability:
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308403
Abstract:
This report provides information to assist state transportation agency staff to recognize the
potential value of the agency’s intellectual assets and the agency’s responsibilities in respecting
the intellectual property (IP) rights of others. The report presents guidance on how agencies can
manage the copyrights, patents, and other IP that may be used or produced as a byproduct of
the agency’s usual business activities. This guidance is intended to provide agency program
staff with an introductory explanation of the nature of intellectual property, the legal framework
for defining and protecting intellectual property, and basic principles for its management. The
report includes examples and references for cases, tools, and other materials to enhance
readers’ understanding of the activities likely to be associated with effectively managing an
agency’s intellectual property.
Report/Paper Numbers:
Project 20-89
Language:
English
NCHRP 801
Proposed Practice for Alternative Bidding of Highway Drainage Systems
Accession Number:
01562498
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172502.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/172502.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308595
Abstract:
This research investigated the use of a performance-based process for selection of drainage
pipe systems. Such a selection process is based on satisfying performance criteria for the
drainage system while considering the full range of suitable pipe materials. This approach has
the potential to foster competition among various pipe types judged to be of satisfactory quality
and equally acceptable on the basis of engineering and cost analyses. Giving contractors the
ability to choose from among alternative drainage pipe systems during the bidding process on
the basis of performance and cost can help agencies promote competition that will lower agency
costs while achieving satisfactory performance. The objective of NCHRP Project 10-86 was to
develop a proposed practice suitable for adoption by AASHTO to guide owner-agencies and
industry in implementing a performance-based process for contractor selection and delivery of
drainage pipe systems on highway construction projects. The key product of the research is the
proposed practice presented in Appendix A of the report. The practice applies rational,
performance-based criteria to the selection, installation and post-construction acceptance of
highway drainage pipe systems. It specifically addresses the selection of pipe solutions by
evaluating the hydraulic capacity, structural capacity, and durability of pipe systems in distinct
stages. Since durability is predicted in terms of estimated service life, the practice emphasizes
proper characterization of the site conditions and comprehensive post-installation inspection to
confirm construction quality. The practice was tested and refined through comparisons in nine
states to standard agency procedures for pipe specification and was shown to satisfactorily
consider the wide variety of factors required to successfully bid alternative pipe systems. This
report fully documents the research and includes the following two appendixes: Appendix A:
AASHTO Recommended Practice for Alternative Bidding of Highway Drainage System and
Appendix C: Summary of Durability Evaluation Methods and Software Applications.
Report/Paper Numbers:
Project 10-86
Language:
English
NCHRP 802
Volume Reduction of Highway Runoff in Urban Areas: Guidance Manual
Accession Number:
01560476
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172415.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/172415.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308458
Abstract:
This guidance manual provides practical, research-based evaluation and implementation
practices for the reduction of stormwater volumes in urban highway environments. The manual
outlines a five-step process for the identification, evaluation, and design of feasible solutions for
runoff volume reduction based on site-specific conditions. It is accompanied by a CD-ROM
(CRP-CD-162) containing a Volume Performance Tool to assist the user in efficiently estimating
the performance of volume reduction approaches and understanding the effects and sensitivity
of local climate patterns, design attributes, and site conditions. The manual also includes a set
of volume reduction approach fact sheets and a user guide for the Volume Performance Tool.
This guidance manual will be useful to DOT managers, project staff and design engineers,
permit writers, consultants, and planners.
Report/Paper Numbers:
Project 25-41
Language:
English
NCHRP 803
Pedestrian and Bicycle Transportation Along Existing Roads—ActiveTrans Priority Tool
Guidebook
Accession Number:
01560655
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172459.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308540
Abstract:
This guidebook presents the “ActiveTrans Priority Tool (APT),” a step-by-step methodology for
prioritizing improvements to pedestrian and bicycle facilities, either separately or together as
part of a “complete streets” evaluation approach. The methodology is flexible, allowing the user
to assign goals and values that reflect those of the agency and the community. It is also
transparent, breaking down the process into a series of discrete steps that can be easily
documented and communicated to the public. The guidebook is supplemented by a CD (CRPCD-163) that contains a programmed spreadsheet to facilitate implementation of the
ActiveTrans methodology, as well as a final report that documents the research approach,
findings, and conclusions. The guidebook will be very useful to planners and other staff
responsible for the most effective allocation of scarce resources to where they will provide the
most benefit.
Report/Paper Numbers:
Project 07-17
Language:
English
NCHRP 804
Guidebook for Designing and Managing Rights-of-Way for Carbon Sequestration and
Biomass Generation
Accession Number:
01562896
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172505.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/172505.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308564
Abstract:
This report provides a Guidebook and Toolkit that describes the state of the practice of using
highway rights-of-way (ROWs) vegetation for carbon sequestration and biomass generation for
use as feedstock for biopower and biofuel production. This Guidebook merges the knowledge of
market conditions and regulations for environmental commodities that are energy- and/or
greenhouse-gas based, regulations governing the highway ROWs for commercial or revenue
purposes, the best practices of highway vegetation management and agronomic practices for
raising feedstock crops for carbon sequestration, biopower, and biofuels. The Feasibility Toolkit,
available on CD-ROM (CRP-CD-165), may assist users with modeling a proposed project’s
financial viability that the user can modify to develop a customized analysis.
Report/Paper Numbers:
Project 25-35
Language:
English
NCHRP 805
Improved Test Methods for Specific Gravity and Absorption of Coarse and Fine
Aggregate
Accession Number:
01562968
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172541.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/172541.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308533
Abstract:
Design and production of paving asphalt and portland cement concrete (PCC) mixtures rely on
accurate, precise measurement of aggregate specific gravity and absorption. Aggregate specific
gravities are needed to calculate the voids in mineral aggregate (VMA) and effective binder
content of asphalt mixtures, which are key volumetric properties used in mix design and
acceptance testing. For PCC, aggregate absorption is used to adjust water/ cement or
water/cementitious material ratios which affect the workability of PCC and are a good indicator
of PCC’s resistance to freezing and thawing and PCC’s durability. The current AASHTO
standard test methods for aggregate specific gravity and absorption, namely, T 84, Specific
Gravity and Absorption of Fine Aggregate, and T 85, Specific Gravity and Absorption of Coarse
Aggregate, share several shortcomings in terms of subjectivity of the measurements, time
requirements for conditioning and testing, and precision. The objective of NCHRP Project 4-35
was to develop test methods for determining the specific gravity and absorption of coarse and
fine aggregates with improved accuracy, precision, ease of use, and time required for
conditioning and testing, compared to the current AASHTO T 84 and T 85 methods. The key
outcome of the research is the finding that AASHTO T 85 with several proposed changes,
AASHTO T 84 (modified to remove and separately test P200 material), and ASTM D7172
(Standard Test Method for Determining the Relative Density (Specific Gravity) and Absorption of
Fine Aggregates Using Infrared) provide a good balance of accuracy and precision compared to
the other methods evaluated, including the current AASHTO T 85 and T 84. This finding was
developed through a critical literature review on the basis of which an initial set of ten test
methods was selected for evaluation in a series of five laboratory experiments and a
ruggedness study. This report fully documents the research and includes the following two
appendixes: Revised AASHTO T 85 and Revised AASHTO T 84 In addition, seven appendixes
are available to download from the NCHRP Project 4-35 web page at
http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=1614. These appendixes
summarize the literature review, testing results of the experiments, and results of a ruggedness
study.
Report/Paper Numbers:
Project 04-35
Language:
English
NCHRP 806
Guide to Cross-Asset Resource Allocation and the Impact on Transportation System
Performance
Accession Number:
01560658
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172356.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/172356.aspx
Find a library where document is available
Order URL: http://worldcat.org/isbn/9780309308526
Abstract:
State departments of transportation (DOTs) and other local and regional agencies must invest
public resources—funds, land, staffing, and others—to develop and operate a transportation
system that will provide mobility—efficiently, safely, and with the least possible environmentally
adverse impact—to support the economy and enhance quality of life. These investments are
made to construct, maintain, preserve, enhance, rehabilitate, or replace a diverse portfolio of
physical assets such as pavement, traffic signals, guardrails, bridges, signs, and drainage
structures. Deciding how best to allocate inevitably limited resources across these various types
of assets to provide acceptable transportation system performance poses a persistent and
difficult challenge for agency managers, elected officials, and the public. This report presents
guidance for state transportation agencies on allocating limited resources among asset classes
and organizational units to provide optimal system performance. The guidance includes
discussion of analytical tools to support decision making and is supplemented by a prototypical
spreadsheet-based implementation of the guide’s analysis framework.
Report/Paper Numbers:
Project 08-91
Language:
English
NCHRP 807
Properties of Foamed Asphalt for Warm Mix Asphalt Applications
Accession Number:
01563757
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172584.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/172584.aspx
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Order URL: http://worldcat.org/isbn/9780309308663
Abstract:
This report presents proposed AASHTO standard test methods for measuring performancerelated properties of foamed asphalts and designing foamed asphalt mixes with satisfactory
aggregate coating and workability. The objectives of this project were to determine key
properties of foamed asphalt binders that significantly influence the performance of asphalt
mixtures and develop laboratory protocols for foaming of asphalt binders and laboratory mixing
procedures. The production and performance-related properties of foamed asphalt were
investigated through a series of laboratory and field experiments. A key finding of the research
is that the foaming characteristics of an asphalt binder are primarily affected by its source (i.e.,
its crude oil slate), the production date for a given refinery and crude oil slate, and polymer
modification. A laser-based method was developed to measure parameters associated with the
expansion and collapse of foamed asphalt. A digital photographic approach was developed to
characterize the size, distribution, and surface area of bubbles formed during production of
foamed asphalt. Methods were also identified for determining a coatability index for foamed
asphalt and the workability of mixes produced with foamed asphalt. A foamed asphalt mixture
design procedure was developed to identify the optimum water content for coating and
workability. Finally, the utility and effectiveness of these various methods were verified through
their application to foamed asphalt binder and mix produced in full-scale asphalt mix plants. This
report fully documents the research. Four appendixes are included: Influence of Binder
Properties on Binder Foam Expansion; Draft Commentary on Guidelines Proposed for Revising
Appendix to AASHTO R 35; AASHTO Style Standards; and Field Foaming Data Acquisition
Form.
Report/Paper Numbers:
Project 09-53
Language:
English
NCHRP 808
Guidebook on Alternative Quality Management Systems for Highway Construction
Accession Number:
01567120
Record Type:
Monograph
Record URL:
http://www.trb.org/Main/Blurbs/172747.aspx
Availability:
Transportation Research Board Business Office
500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Blurbs/172747.aspx
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Order URL: http://worldcat.org/isbn/9780309308700
Abstract:
This guidebook provides recommendations and tools to assist in developing quality
management systems (QMSs) and assistance in creating a better definition of quality
management in the context of alternative project delivery. The roles of owners and contractors
in QMSs are changing, leading to variation in the roles and responsibilities of quality assurance
organization (QAO). These range from the agency-dominated system of quality management
associated with the traditional design-bid-build (DBB) method to design-build (DB)/public-private
partnership (PPP) agreements where the responsibility for quality management is shared to
varying degrees between the contractor and owner. The chapters in this report address the
business case for alternative QMSs, QAOs, QAO selection, and useful tools for an alternative
QMS. This report will be valuable to highway construction engineers by facilitating the
development of QMSs for evolving alternative project delivery methods.
Report/Paper Numbers:
Project 10-83
Language:
English