Traffic Analysis Toolbox &
Highway Capacity Manual Transition
Tyrone Scorsone
FDOT Systems Planning
Transportation Research Board’s (TRB)
Highway Capacity Manual (HCM)
2
HCM
Quality/Level of Service
(QLOS) Handbook
Facility Level Analysis
Detailed Point &
Segment Analysis
3
Advantages of Analytical/Deterministic Tools
Quickly predict
impacts
Widely
accepted
4
LOS Planning/Preliminary
Engineering Tools
Preliminary
Engineering
Software
Generalized
Planning
Tables
http://www.dot.state.fl.us/planning/systems/sm/los/default.htm
5
6
Capacity/LOS Analyses and Evaluation Tools
(Microsimulation)
CORSIM
Potential Accuracy
TRANSYT-7F
HCM | TCQSM
BLOS | PLOS
ARTPLAN
FREEPLAN
HIGHPLAN
(Simple Operational Analysis)
(Preliminary Engineering)
Generalized Tables (Generalized Planning)
Effort/Complexity
7
Exporting Data to Highway
Capacity Software (HCS)
8
Planning Uses of LOS Techniques
Initial problem identification
Delay calculation
Future year analysis
Conducting alternatives analyses
Assessing development impacts
9
Primary Uses of LOS Techniques
Site Impact
Future
Year
Analysis
Project
Development
Other
10
Transportation Impact Handbook
FDOTTransportationImpactHandbook.com
11
Screen for impacts of
Development
12
Screen for impacts
of Development
Screen for impacts of
Development
13
The Users Perspective
14
A/B
Automobile LOS
C/D
E/F
15
A/B
Modal LOS
Bicycle
C/D
E/F
16
A/B
Modal LOS
Pedestrian
C/D
E/F
17
A/B
>4 buses/hour
Modal LOS
Bus
C/D
2 to 4 buses/hour
E/F
< 1 bus/hour
18
Capacity/LOS Analyses and Evaluation Tools
(Microsimulation)
CORSIM
Potential Accuracy
TRANSYT-7F
HCM | TCQSM
BLOS | PLOS
ARTPLAN
FREEPLAN
HIGHPLAN
(Simple Operational Analysis)
(Preliminary Engineering)
Generalized Tables (Generalized Planning)
Effort/Complexity
19
Generalized Service Volume Tables…
…provide estimates of
maximum service volumes
for various types of Florida
road facilities
…represent average roadway
conditions for the state, not
representative of any single
roadway
…allow analysts to quickly and
easily compare volumes to
estimate LOS.
20
Types of Tables
(mostly used
in planning)
Daily Two-Way
Urbanized
Transitioning/Urban
Rural
(However, all are based on a peak
hour peak direction analysis)
Peak Hour Two-Way
Urbanized
Transitioning/Urban
Rural
Peak Hour Peak Direction
Urbanized
Transitioning/Urban
Rural
21
Service Volume Tables In General
22
Potential Applications
Quick estimate of LOS
Is there a problem?
System adequacy
Travel demand models
Roadway quick sizing
23
Table Exercise
1
LOS=C
95,400
LOS=E
122,700
• Determine the maximum
service volumes
– In terms of annual average
daily traffic (AADT) volume
– In an urbanized area
– For a freeway with:
• 6 lanes
24
Capacity/LOS Analyses and Evaluation Tools
(Microsimulation)
CORSIM
Potential Accuracy
TRANSYT-7F
HCM | TCQSM
BLOS | PLOS
ARTPLAN
FREEPLAN
HIGHPLAN
(Simple Operational Analysis)
(Preliminary Engineering)
Generalized Tables (Generalized Planning)
Effort/Complexity
25
Demonstration
Of LOSPLAN
26
LOS Planning/Preliminary Engineering Tools
will be updated in 2012
2012
www.dot.state.fl.us/planning/systems/sm/los/
27
Highway
Capacity
Manual
Transition
28
Presentation Purposes
Highway Capacity Manual
Past, Present & Future
Adopting the 2010 HCM
What Has To Change
Implementing the 2010 HCM
How Long Will It Take
29
HCM/LOS History
1985:
Refined
LOS Direction
1965:
LOS Concept
2010:
Integrated
Multimodal
Perspective
30
2010 Highway Capacity Manual
2010 HCM
Significant
changes
When to
phase in?
To be published
this month
New arterial
performance
measure
Receiving
implementation
inquiries
Replaces 2000
HCM
Multimodal
31
2010 HCM Implementation Issues
Why Not
Transition
Immediately?
LOS
“Standard K”
Factors
Rule Update
Technical
Impacts
Rules
Arterials
Policies
Freeways
Procedures
Consistency
Need for
State-wide
Consistent
Response to
Phasing in of
2010 HCM
32
What is “Standard K”?
Rather than having “K” be a traffic variable,
make it a fixed parameter based on:
Area Type
Facility
Type
“K” Factor: Ratio of peak hour traffic to AADT
33
Importance of
LOS Standards and K Factor
Promotes Better
Transportation
• Time and cost savings to FDOT
• Update to latest research
Consistency:
Planning Through
Design
• Within Department
• Throughout development community
• Simple to understand
Sensible Approach
• Positive for Development
• Supportive of Growth Management
34
2 Arterial Classes
1
2
35
Implementation Schedule
July ‘11
January ‘12
July ‘12
December ‘12
Refine HCM Analyses
Implement “Standard K” Factors
Update LOS Standards
Update Procedures &
Guidelines
Coordination, Transition & Adoption
36
QUESTIONS?
37
FDOT’s transition plan to the 2010 HCM
represents a logical comprehensive
process which includes evaluating a few
key 2010 HCM changes, possibly
implementing technical changes to
current practice, possibly updating its
level of service standards, and updating
its own HCM-based software. FDOT
recognizes it cannot require this
transition period be applied to outside
entities; however, it requests those
entities accept this relatively short
transition period.
38