ROAD SAFETY AUDIT
Boston Worcester Turnpike (Route 9) at
Lyman Street
Town of Westborough
August 13, 2012
Prepared For:
MassDOT Highway Division
Prepared By:
BETA Group, Inc.
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Table of Contents
Project Data .................................................................................................................................1
Background .................................................................................................................................2
Project Description .....................................................................................................................2
Audit Observations .....................................................................................................................6
Potential Safety Enhancements .................................................................................................9
Summary of Road Safety Audit...............................................................................................11
List of Appendices
Appendix A.
Appendix B.
Appendix C.
Appendix D.
RSA Meeting Agenda
RSA Audit Team Contact List
Detailed Crash Data
Speed Regulations
List of Figures
Figure 1.
Figure 2.
Location Map ......................................................................................................................... 3
Location Detail ....................................................................................................................... 4
List of Tables
Table 1.
Table 2.
Table 3.
Participating Audit Team Members ....................................................................................... 1
Estimated Time Frame and Costs Breakdown ....................................................................... 9
Potential Safety Enhancement Summary ............................................................................. 12
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Project Data
A Road Safety Audit for the intersection of Boston Worcester Turnpike (Route 9) and Lyman Street was
held on July 18, 2012 at the Department of Public Works in Westborough, MA. As indicated in Table 1,
the audit team consisted of representatives from State, Regional and Local agencies and included a crosssection of engineering, planning and emergency response expertise.
Table 1. Participating Audit Team Members
Audit Team Member
Agency/Affiliation
Bonnie Polin
MassDOT Highway Division – Safety Section
Carl Balduf
Town of Westborough - DPW Town Engineer
Nick Perron
Town of Westborough – Fire Chief
Jim Danila
MassDOT Highway Division
Corey O’Connor
MassDOT Highway Division
Dan Daniska
CMRPC
Kevin Krasnecky
CMRPC
Sujatha Mohanakrishnan
CMRPC
Alan Gordon
Town of Westborough – Police Chief
Jim Robbins
Town of Westborough – Town Planner
John Diaz
GPI
Alolade Campbell
MassDOT Highway Division District 3
Greg Lucas
BETA Group, Inc.
Christine Keches
BETA Group, Inc.
Page 1
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Background
The Federal Highway Administration defines a Road Safety Audit (RSA) as the formal safety
examination of an existing or future road or intersection by an independent, multidisciplinary team. The
purpose of an RSA is to identify potential safety issues and possible opportunities for safety
improvements considering all roadway users. A Road Safety Audit was scheduled for the intersection of
Boston Worcester Turnpike (Route 9) and Lyman Street as required by MassDOT Highway Safety
Improvement Program (HSIP) guidelines. The intersection has been identified as a high crash location in
the Central Massachusetts Regional Planning Commission (CMRPC) region and is scheduled to be
reconstructed in 2015 by the MassDOT Highway Division potentially using HSIP funds (Project File No.
604864). 25% design plans for the project were submitted to MassDOT in 2011, and the general scope of
the proposed improvements was discussed at the audit. The RSA is intended to identify potential short
and long term safety improvements that can be made at the intersection, which can then be incorporated
into the planned reconstruction project to the greatest extent practicable.
Project Description
The intersection of Boston Worcester
Turnpike (Route 9) and Lyman Street,
shown in Figure 1, is located in the
north-central portion of Westborough.
Route 9 is under MassDOT
jurisdiction and is functionally
classified as a Principal Arterial, while
Lyman Street is under local
jurisdiction and is classified as an
Urban Collector. Route 9 is an
important regional roadway, providing
access from Westborough to
Shrewsbury and Worcester to the west
and to Framingham, Natick and
ultimately Boston to the east. Lyman
Street is a north-south roadway that
Lyman Street at Route 9
provides access to Northborough to
the north and connects to East Main Street (Route 30) approximately 2,000 feet south of Route 9, with
Route 30 providing access to the town center of Westborough.
Route 9 and Lyman Street form a 4-way intersection under traffic signal control. Route 9 eastbound
generally provides two through lanes, which expands to four lanes at Lyman Street with a left turn lane,
two through lanes, and a shared through-right lane. The shared through-right lane begins approximately
800 feet in advance of Lyman Street in advance of several commercial driveways near the intersection.
The three eastbound through lanes continue for approximately 1,500 feet beyond Lyman Street before a
lane merge back to two lanes. Route 9 westbound provides a similar cross-section, with a left turn lane,
two through lanes, and a shared through-right lane. The westbound shared through-right lane begins
Page 2
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Boston Worcester Turnpike (Route 9)
at Lyman Street
Figure 1
ROAD SAFETY AUDIT
WESTBOROUGH, MA
Location Map
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
approximately 850 feet in advance of Lyman Street and also provides access to several commercial
driveways near the intersection. The three westbound lanes continue for approximately 700 feet beyond
Lyman Street before a lane merge back to two lanes. The widened intersection approaches provide a
striped edge line between two and four feet in width on Route 9, and no shoulders or edge lines on Lyman
Street. Route 9 is median divided along its entirety, with a concrete barrier creating the median separation
in the vicinity of Lyman Street. Guardrail and a crash cushion form the nose of the median at Lyman
Street, and a small flush cobblestone area is provided to guide turning and U-turning vehicles. A widened
pavement area is provided on the westbound departure side of the intersection for eastbound to westbound
u-turns, but is not provided on the eastbound side for westbound to eastbound u-turns.
Lyman Street north of the intersection provides one lane in each direction, which widens to a two lane
approach for approximately 200 feet in advance of Route 9 with a left lane and a shared through-right
lane. Lyman Street south of the intersection between Route 9 and Route 30 provides one through lane in
each direction, with left turn lanes provided to access commercial properties along the corridor. The
approach at Route 9 provides three lanes – a left lane, a through lane, and a shared through-right lane.
Observations on the day of the audit reveal that the right lane acts as a de facto right turn lane.
The traffic signal operates with exclusive left turn phases for Route 9, and protected/permissive left turn
phasing for Lyman Street. No pedestrian pushbuttons or pedestrian signals are provided. No sidewalks are
provided along Route 9 or Lyman Street, and no crosswalks are provided at the intersection.
Land use in the area is primarily commercial, with residences along Lyman Street north of the
intersection. Figure 2 below illustrates the specific businesses immediately adjacent to the intersection.
Figure 2.
Location Detail
Page 4
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Crash data were provided by the Westborough Police Department and summarized by MassDOT,
showing a total of 88 reported and police documented crashes at the intersection within the period from
January 2009 to December 2011. The data summary and collision diagram include additional data from
the time period that was not included in the background information distributed to the audit team in
advance of the audit. Crashes documented by operators only were not reviewed. The crash summary
shows that 49% of the crashes were rear-end crashes. A closer review of the collision diagram shows that
19 rear-end crashes occurred on Route 9 eastbound, 12 occurred on Route 9 westbound, four on Lyman
Street northbound and four on Lyman Street southbound. The majority of rear-end crashes did not involve
an injury, indicating that these are likely low speed, low impact crashes. This may be the result of traffic
congestion and driver frustration, where a driver accelerates in anticipation of a driver in front of them
moving, or where a driver in queue accelerates at the beginning of the yellow clearance phase expecting
the driver in front of them to also clear the signal during the yellow phase. It may also be the result of
following drivers not anticipating a driver slowing to turn into a commercial driveway or stopping to let
another vehicle exit a commercial driveway.
Commercial driveways are a factor in the crash history of the intersection, with 26 angle crashes
attributable to vehicles entering or exiting the commercial driveways immediately adjacent to the
intersection. Of specific note are the Mobil and Shell driveways onto the south leg of Lyman Street,
where 13 crashes occurred. A crash summary and collision diagram are included in the Appendix.
The intersection ranks 185th on MassDOT’s statewide list of Top Crash Intersections from 2007 to 2009.
The MassDOT ranking is based on the number of crashes in MassDOT’s database which can be
georeferenced to a cluster area around the intersection. This cluster area experienced 64 crashes in the
three year period, with ten of the 64 crashes involving an injury. The ranking is based on a weighted
system which calculates the Equivalent Property Damage Only (EPDO) rating of the intersection. Fatal
crashes are weighted 10 times and injury crashes are weighted 5 times. There were no fatal crashes at the
intersection in the period. It was noted during the audit that the intersection ranked 80th on the previous
year’s ranking, representing data from 2006 to 2008.
Speed regulations maintained by MassDOT Highway Division establish a 45 MPH speed limit for Route
9 and a 30 mph speed limit for Lyman Street. Complete speed regulations are included in the Appendix.
Page 5
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Audit Observations
Following a brief introduction to the RSA process and a summary of existing geometry, crash and speed
regulation information, the audit participants were asked to discuss safety issues at the intersection of
Boston Worcester Turnpike (Route 9) and Lyman Street. Audit participants then conducted a site visit as
a group, at which time they offered observations on safety concerns and deficiencies. A summary of those
major safety considerations is as follows:
Traffic Congestion & Signal Operation – Several safety issues were related to traffic congestion,
signal phasing and driver behavior.
o Audit participants familiar with the intersection stated that the capacity of the intersection
is strained during peak periods. Although no specific data were provided to the audit
team, it was noted that long queues develop on the Lyman Street approaches, and that
vehicles typically spill back beyond the available storage in the southbound direction.
The history of rear-end crashes may be the result of more aggressive drivers in queue
planning to go through the intersection during the yellow clearance phase when a vehicle
in front of them stops.
o It was noted that right turns on red are restricted from the Lyman Street approaches,
which contributes to queues because right turning vehicles must wait for a green
indication.
o It was also noted that confusion exists over the protected/permissive operation of the
Lyman Street left turns, and that drivers unfamiliar with the intersection may either wait
for the protected turn or may assume that the left turn is protected during the permissive
phase. This may be a factor in angle crashes involving turning vehicles.
o The existing queue storage on the southbound Lyman Street approach is inadequate and
should be increased.
Lane Designation – The designation of the outside lane on Route 9 in each direction as a shared
through-right lane may cause confusion and be a factor in rear-end and sideswipe crashes at the
intersection. It was noted that the Route 9 corridor varies between two and three through lanes near
Lyman Street, and that vehicles in the right lane may assume that they are in a continuous through
lane when instead they have to merge back into another lane after traveling through the intersection.
Conversely, traffic utilizing the lane as a through lane may not be expecting slowed and stopped
traffic related to turning movements to and from adjacent businesses. This may be a factor in the
significant history of angle crashes at commercial driveways.
Cut-through Traffic/Access to Abutting Properties – It was noted that right-turning vehicles that are
prevented from making a right turn by a red signal and/or a stopped through vehicle utilize the
commercial driveways on the corners as cut-throughs. This is possible with the Mobil station on the
southwest corner, the Shell station on the southeast corner, and the Burger King on the northeast
corner. This may also be a contributing factor in the significant history of angle crashes near
Page 6
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
commercial driveways. It was noted that the Shell station installed video cameras to capture license
plates and have the local police notify vehicle owners.
Pavement Markings - Pavement markings are faded at the intersection, which decreases visibility of
defined lane use. This may be a factor in sideswipe crashes at the intersection.
Pedestrian Accommodation - Pedestrian signals are not provided at the intersection, which requires
pedestrians to cross concurrently between gaps in traffic. Sidewalks and crosswalks are not provided
at the intersection, but audit participants noted that pedestrians regularly cross the intersection, and
one such crossing was observed during the audit. The pedestrian crossed the eastbound departure
lanes, waited in the cobblestone
area at the nose of the median, and
then crossed the westbound
approach lanes while westbound
traffic was stopped. It should be
noted that the median area is
inadequate for pedestrian refuge.
Bicycle Accommodation –
Existing shoulder widths are not
adequate for bicycle travel, and no
specific accommodations are
provided as part of the existing
traffic signal operation. A bicyclist
was observed during the audit
crossing the intersection at the
same time and following the same
pattern as the pedestrian described
above.
Pedestrian and bicyclist crossing Route 9
Pavement Condition – Rutting and settlement of the pavement exists on the intersection approaches,
potentially exacerbated by heavy vehicle traffic along Route 9.
Drainage/Ponding – It was noted that certain areas experienced ponding as a result of drainage
deficiencies in the past, but that this situation was
improved following a pavement overlay along Route 9.
Turning Radii – The curve radius exiting the Burger King
driveway onto Lyman Street is inadequate, and there is
evidence of vehicles driving over the asphalt berm and
grass area at this driveway exit, as seen in the photo at
right.
U-turn Area – The westbound-to-eastbound U-turn area is
inadequate for large trucks to complete the turn.
Page 7
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Cobblestone Area – The cobblestone areas at the nose of the medians on Route 9 are in poor
condition, with an uneven surface created by settlement and movement of the cobblestones.
Advance Street Name Signs – The lack of advance street name signs was noted as a safety issue, but
following the audit it was confirmed that advanced street name signs are provided on both Route 9
approaches to Lyman Street.
Lane Control Signs - It was noted that the lack of lane control signage increases the potential for
conflicts for approaching drivers, which may be a factor in rear-end and sideswipe crashes.
Page 8
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Potential Safety Enhancements
After the site visit, audit participants returned to the meeting location, where a summary of the proposed
design was presented and the audit team was asked to discuss the safety issues and consider
improvements. Audit participants were encouraged to consider both short and long term improvements
for each issue. Each improvement considered has been categorized as short-term, mid-term, or long-term
based on the definitions shown in Table 2. Additionally, a cost category has been assigned to each
improvement based on the parameters set forth in Table 2.
Table 2. Estimated Time Frame and Costs Breakdown
Time Frame
Short-term
<1 year
Costs
Low
Mid-term
1–3 years
Medium
Long-term
>3 years
High
<$10,000
$10,000–$50,000
>$50,000
The following improvements were suggested by audit participants to improve safety issues associated
with the intersection of Boston Worcester Turnpike (Route 9) and Lyman Street.
Reconstruct the intersection to add capacity. As previously discussed, the intersection is scheduled for
reconstruction in 2015, potentially using HSIP funds. The proposed design was presented at the
meeting and includes dual left turn lanes in both directions on Route 9 along with three through lanes,
with the right lane shared for right turning vehicles. Several audit participants expressed concern that
without dedicated right turn lanes, the proposed design fails to provide adequate capacity for right
turns and may not address the safety issues created by conflicts with turning traffic. MassDOT will
utilize methods outlined in the Highway Safety Manual to determine if dedicated right turn lanes can
be expected to reduce crashes on the Route 9 approaches. The designer should continue discussions
with MassDOT and the Town to determine the feasibility and appropriateness of dedicated right turn
lanes. The proposed design features a dedicated left turn lane, a through lane, and a shared throughright lane for Lyman Street in both directions, with increased storage capacity for turning vehicles.
Reconstruction of the intersection is a mid-term, high cost improvement.
Provide protected only operation for left turns from Lyman Street. The proposed design provides
added storage capacity and provides split phasing for the northbound and southbound Lyman Street
approaches. This will reduce conflicts and confusion that exist today because of the
protected/permissive operation. This is a long-term improvement that is incorporated into the overall
improvements planned at the intersection. A change to protected only or split phasing is not
recommended in the short term, because the reduction in left turn capacity would only further
exacerbate queuing concerns along Lyman Street.
Restrict exits from the Mobil driveway on Lyman Street to right turns only. The Mobil gas station on
the southwest corner of the intersection has separate entrance and exit driveways on Route 9, and a
wide driveway allowing both entry and exit onto Lyman Street. It is recommended that markings and
signage be installed to restrict vehicles from turning left out of the Lyman Street driveway. Widening
of the Lyman Street approaches will require a turning vehicle to traverse more lanes for site access
Page 9
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
and egress, which may create additional concerns; however, entrance should still be allowed at this
time, as this is the only way for a vehicle from Lyman Street to enter the gas station. This is a shortterm, low cost improvement.
Reapply pavement markings. This is a short-term, medium cost improvement that will be
accomplished as part of the planned reconstruction project.
Provide bicycle accommodation. It was noted that improvements at the intersection provide an 8'
shoulder and bike lane along Route 9 with a minimum 4' shoulder along Lyman Street, which meets
state standards for bicycle accommodation. The project should also include detection of bicycles as
part of signal operation. This is a mid-term, high cost improvement.
Consider pedestrian accommodation. The observance of a pedestrian crossing on the day of the audit
spurred a debate amongst audit participants over the need to provide crosswalks and a pedestrian
phase. The presence of a pedestrian crossing in an area where there are no sidewalks may draw
pedestrians to walk along roadways that do not safely accommodate them, while the occurrence of
crossings under existing conditions demonstrates a need for pedestrian accommodations. This
potential improvement should be further studied and discussed with MassDOT and the Town of
Westborough.
Rehabilitate pavement. Rutting and settlement of pavement is visible at the intersection. The
pavement should be rehabilitated along the corridor, with the appropriate method determined by the
design engineer based on the results of subsurface exploration. This is a mid-term, high cost
improvement which should be done as part of planned improvements.
Improve the turning radius exiting the Burger King driveway onto Lyman Street. The existing
driveway radius is inadequate, as evidenced by damage to the asphalt berm and grass. This is a shortterm, low cost improvement.
Increase the U-turn area adjacent to the eastbound departure lanes for westbound to eastbound Uturns. It was noted that the existing area is inadequate. Proposed modifications should include study
of truck turning paths to ensure that enough room is provided for a large truck to make this U-turn.
The existing area adjacent to the westbound departure lanes for eastbound to westbound U-turns
should be retained or replaced in kind. This is a mid-term, high cost improvement which should be
done as part of planned improvements.
Repair or replace the cobblestone area at the nose of the Route 9 medians. These areas should be
repaired as a short term improvement. It was noted that the cobblestone will be removed as part of
planned improvements and will be replaced with asphalt.
Install lane usage signage. It was suggested that additional lane control signage is needed for all
approaches. It is recommended that R3-8 series graphical signs be provided. This is a potential shortterm, low cost improvement that should also be included in planned improvements.
Page 10
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Summary of Road Safety Audit
Table 3 summarizes potential recommendations discussed by the audit team. The recommendations are
categorized based on the potential safety payoff, as well as by time frame and cost. The safety payoff is a
qualitative judgment of the effectiveness of the potential safety improvements. Each recommendation has
a responsibility assigned to it stating whether MassDOT or the Town of Westborough would be
responsible for implementing the recommended improvement. “Project” refers to improvements that are
assumed to be included or could reasonably be accommodated as part of planned improvements at the
intersection. Costs provided for “Project” improvements are an order of magnitude estimate which
estimates the cost of the improvement if completed independent of the project.
Page 11
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Table 3. Potential Safety Enhancement Summary
Responsibility
Safety
Payoff
Time Frame
Cost
Traffic Congestion &
Signal Operation,
Lane Designation
Reconstruct the intersection to add capacity. The designer should
continue discussions with MassDOT and the Town to determine
the feasibility and appropriateness of dedicated right turn lanes.
(In the short-term, MassDOT will utilize methods outlined in the
Highway Safety Manual to determine if dedicated right turn lanes
can be expected to reduce crashes on the Route 9 approaches.)
Project
High
Mid-term
*
Traffic Congestion &
Signal Operation
Provide protected-only operation for left turns from Lyman Street.
This will be accomplished via split phasing.
Project
High
Mid-term
*
Access to Abutting
Properties
Restrict exits from the Mobil driveway on Lyman Street to right
turns only. This can be done with pavement markings and signage.
Town
Medium
Short-term
$5,000
Pavement Markings
Reapply pavement markings.
Project
Medium
Mid-term
*
Bicycle
Accommodation
Provide bicycle accommodation. The proposed project includes 4’
minimum shoulders, and will include bicycle detection as part of
the upgraded traffic signal.
Project
Medium
Mid-term
*
Pedestrian
Accommodation
Consider pedestrian accommodation. There was debate amongst
audit participants as to whether crosswalks and a pedestrian
phase should be provided. This potential improvement should be
further studied and discussed with MassDOT and the Town of
Westborough.
MassDOT/
Town
TBD
Mid-term
*
Pavement Condition
Rehabilitate pavement at the intersection.
Project
Medium
Mid-term
*
Turning Radii
Improve the turning radius exiting the Burger King driveway onto
Lyman Street.
Town
Low
Short-term
$7,500
Project
Medium
Mid-term
*
MassDOT
MassDOT
(Short-term)
Project (Longterm)
Medium
Short-term
$5,000
Medium
Short-term
$1,500
Safety Issue
Safety Enhancement
Cobblestone Area
Increase the U-turn area adjacent to the eastbound departure
lanes for westbound to eastbound U-turn
Repair the cobblestone area at the nose of the Route 9 medians.
Lane Control Signs
Install R3-8 series graphical lane control signs on all approaches.
U-Turn Area
*
Improvements to be incorporated into the proposed project are assumed to be included as part of the overall project cost.
Page 12
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Appendix A. RSA Meeting Agenda
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Appendix B. RSA Audit Team Contact List
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Appendix C. Detailed Crash Data
Top Crash Intersections 2007-2009 WESTBOROUGH
RANK 185 BOSTON WORCESTER TURNPIKE ROUTE 9 LYMAN STREET Legend
MassDOT District 3 RPA CMRPC EPDO 104 Number of Fatal Crashes 0 Number of Injury Crashes 10 Number of Non-Injury Crashes 54 Total Crashes 64 •
Crash Locations 2007-2009 ~ Local Roads /'V
All Functional Classification Except Local Roads Top Crash Intersections
171assDOT Massachusetts Department of Transportation
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2:37 PM
23 11:05 PM
11:57 AM
23 11:16 PM
15 3:28 PM
15 3:08 PM
6 6:25 AM
15 3:05 PM
15 3:19 PM
16 4:16 PM
21 9:40 PM
20 8:12 PM
22
18
13
11
17
20 8:03 PM
6 6:17 AM
12 12:20 PM
11
17
8
12
Summary based on Crash Reports obtained from the Westborough Police Department
6
6
7
8
68
69
70
71
Friday
Tuesday
Wednesday
Saturday
Saturday
Monday
Tuesday
5
2
3
6
6
1
2
3/25/11
Thursday
Wednesday
Thursday
Saturday
Saturday
Friday
Tuesday
Monday
Saturday
Tuesday
Thursday
Friday
Tuesday
Thursday
Sunday
Friday
Thursday
Friday
Wednesday
Wednesday
Monday
Tuesday
Tuesday
Tuesday
Saturday
Thursday
Monday
Thursday
Wednesday
Friday
Monday
Thursday
Friday
Wednesday
4/12/11
4/13/11
4/23/11
4/30/11
5/2/11
5/31/11
4
2/24/11
2
60
3
3
4
6
6
1/26/11
1/27/11
2/12/11
2/12/11
1
1
2
2
56
57
58
59
4
4
4
4
5
5
5
2
1
6
12/10/10
12/14/10
1/3/11
1/22/11
12
12
1
1
52
53
54
55
61
2
4
5
2
4
7
5
4
5
3
3
8/24/10
9/2/10
9/3/10
9/7/10
9/16/10
10/10/10
10/15/10
10/28/10
11/5/10
11/17/10
12/1/10
8
9
9
9
9
10
10
10
11
11
12
41
42
43
44
45
46
47
48
49
50
51
62
63
64
65
66
67
4
1
2
2
2
6
4/29/10
5/3/10
7/13/10
7/20/10
7/27/10
8/14/10
4
5
7
7
7
8
35
36
37
38
39
40
1
4
4/19/10
4/29/10
4
4
33
34
3
5
1
4
3/10/10
3/19/10
3/22/10
4/8/10
3
3
3
4
5
3/5/10
29
30
31
32
3
2/17/10
2
3
Friday
Friday
Tuesday
Thursday
Saturday
Saturday
Sunday
5
5
2
4
6
6
7
12
12
12
1
1
1
2
27
Wednesday
11/25/09 3
12/4/09
12/18/09
12/22/09
1/14/10
1/30/10
1/30/10
2/7/10
11
19
20
21
22
23
24
25
26
28
Wednesday
Monday
Thursday
10/21/09 3
11/16/09 1
11/19/09 4
10
11
11
16
17
18
Thursday
Sunday
Wednesday
4
7
3
9/24/09
9/27/09
9/30/09
9
9
9
13
14
15
Tuesday
Friday
Monday
Friday
Friday
Sunday
2
4
7
7
9
9
8
9
10
11
12
Monday
Saturday
5
1
5
5
7
4
7
1
6
3/9/09
3/21/09
Crash Day
Tuesday
Friday
Friday
Friday
4/7/09
3
3
5
6
Day #
2
5
5
5
1/6/09
1/30/09
2/6/09
2/13/09
Crash
Date
4/24/09
7/6/09
7/17/09
9/4/09
9/6/09
1
.
2
2
Month #
1
2
3
4
#
4
1
1
4
1
1
6
1
1
1
1
1
4
1
3
1
1
4
1
4
1
1
2
1
1
1
4
4
1
1
1
1
1
4
4
1
1
4
1
1
1
1
4
1
1
1
5
1
1
1
1
1
4
Rear-end
Rear-end
Rear-end
Rear-end
Angle
Rear-end
Angle
Rear-end
Angle
Rear-end
Angle
Rear-end
Rear-end
Angle
Angle
Angle
Rear-end
Rear-end
Rear-end
Angle
Rear-end
Rear-end
Rear-end
Angle
Rear-end
Rear-end
Angle
1
1
1
2
1
4
1
4
1
4
4
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
Sideswipe, same direction 1
Angle
Angle
Angle
Angle
Rear-end
Angle
Rear-end
Angle
Rear-end
Head on
Rear-end
Rear-end
Angle
Rear-end
Rear-end
Rear-end
Rear-end
Angle
Rear-end
Angle
Sideswipe, same direction
Rear-end
Rear-end
Rear-end
Angle
Sideswipe, same direction 5
Angle
Angle
Rear-end
Rear-end
Rear-end
Angle
Angle
Angle
Rear-end
Angle
Angle
Rear-end
Angle
Rear-end
Sideswipe, opposite
direction
Rear-end
Angle
Angle
Rear-end
Angle
Rear-end
Rear-end
4
1
1
1
1
Sideswipe, same direction 4
Single Vehicle Crash
Rear-end
Manner of Collision
Rear-end
Angle
Rear-end
Angle
Head on
Angle
Angle
Angle
Rear-end
Crash Data Summary Table
Daylight
Daylight
Daylight
Dawn
Daylight
Dark - lighted roadway
Daylight
Dark - lighted roadway
Daylight
Dark - lighted roadway
Dark - lighted roadway
Daylight
Daylight
Dark - lighted roadway
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Daylight
Dark - lighted roadway
Dark - lighted roadway
Daylight
Daylight
Dark - lighted roadway
Daylight
Daylight
Daylight
Daylight
Dark - lighted roadway
Daylight
Daylight
Daylight
Dark - roadway not lighted
Daylight
Daylight
Daylight
Daylight
Daylight
Dark - lighted roadway
Dark - roadway not lighted
Daylight
Daylight
Daylight
Daylight
Dark, unknown roadway
lighting
Daylight
Dark - lighted roadway
Daylight
Dusk
Daylight
Daylight
Dark - lighted roadway
Daylight
Dark - lighted roadway
Daylight
Daylight
Dawn
Daylight
Daylight
Daylight
Dark - lighted roadway
Dark - lighted roadway
Dark - lighted roadway
Daylight
Daylight
Daylight
Daylight
Dark - lighted roadway
Dark - lighted roadway
Daylight
Light Condition
Daylight
Dark - lighted roadway
Daylight
Daylight
1
3
2
3
3
2
1
1
1
1
2
1
1
2
2
1
2
1
3
1
1
1
1
1
2
1
2
2
2
3
1
2
3
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
3
1
1
1
1
2
2
1
1
1
1
1
2
Cloudy
Clear
Clear
Clear
3
1
3
1
2
2
1
1
3
3
1
1
Rain
Clear
Rain
Clear
Cloudy
Cloudy
Clear
Clear
Rain
Rain
Clear
Clear
3 Rain
2
1
1
1
Clear
Rain
2 Cloudy
1 Clear
Cloudy
Rain
Rain
Cloudy
Clear
Clear
Clear
Clear
Cloudy
Clear
Clear
Cloudy
Cloudy
Clear
Cloudy
Clear
Rain
Clear
Clear
Clear
Clear
Clear
Cloudy
Clear
Cloudy
Cloudy
Cloudy
Rain
Clear
Cloudy
Rain
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Cloudy
Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Rain
Clear
Clear
Clear
Clear
Cloudy
Cloudy
Clear
Clear
Clear
Clear
Clear
Cloudy
Weather Condition
2 Cloudy
2 Cloudy
2 Cloudy
1 Clear
Sleet, Hail,
5 Freezing Rain
1 Clear
1
2
1
2
2
1
1
1
1
1
1
2
1
1
1
1
1
2
2
1
1
1
1
1
2
1
2
1
2
2
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
Wet
Dry
Dry
Dry
2
1
2
1
1
1
1
1
2
2
1
1
Wet
Dry
Wet
Dry
Dry
Dry
Dry
Dry
Wet
Wet
Dry
Dry
1 Dry
2
1
1
1
Dry
Wet
1 Dry
1 Dry
Dry
Wet
Wet
Dry
Dry
Dry
Dry
Dry
Dry
Wet
Dry
Dry
Dry
Dry
Dry
Wet
Wet
Dry
Dry
Dry
Dry
Dry
Wet
Dry
Wet
Dry
Wet
Wet
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Wet
Wet
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Wet
Dry
Dry
Dry
Dry
Wet
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Wet
Dry
Road Surface
Dry
Dry
Dry
Dry
Driver Contributing Code
Inattention
Failed to yield to right of way
Inattention
Failed to yield to right of way
46
54
45
41
Failed to yield to right of way
Inattention
Made an improper turn
Inattention
Inattention
58
56
53
43
33
19
18
23
57
90
35
63
31
41
51
19
34
54
34
Distracted
Followed too closely
Inattention
Made an improper turn
Failed to yield to right of way
Exceeded authorized speed limit
No Improper Driving
Made an improper turn
Inattention
Disregarded traffic signs, signals, road
markings
Unknown
Unknown
Failed to yield to right of way
No Improper Driving
Exceeded authorized speed limit
Other improper action
Inattention
Failed to yield to right of way
Inattention
Inattention
Followed too closely
No Improper Driving
Failed to yield to right of way
Inattention
Failed to yield to right of way
Inattention
Inattention
Inattention
Followed too closely
Unknown
3
19
5
1
1
4
19
5
4
1
19
1
11
10
4
99
19
9
5
19
1
26
1
18
19
19
19
On-board navagation system
No Improper Driving
Visibility Obstructed
Inattention
Inattention
Inattention
Failure to keep in proper lane or running off
road
Followed too closely
Inattention
No Improper Driving
Operating Vehicle in erratic, reckless, careless,
negligent, or aggressive manner
Failed to yield to right of way
Unknown
Inattention
Swerving or avoiding due to wind, slippery
surface, vehicle, object, non-motorist in
roadway, etc.
Disregarded traffic signs, signals, road
markings
Inattention
Followed too closely
No Improper Driving
No Improper Driving
Failed to yield to right of way
Inattention
Followed too closely
Failed to yield to right of way
No Improper Driving
Inattention
No Improper Driving
97 Other improper action
3
2
1
6
19
99
99
4
1
2
97
19
4
19
19
5
1
4
19
4
19
19
19
5
99
4
4 Failed to yield to right of way
19 Inattention
20
5
19
6
33
42
44
26
42
17
31
21
28
58
25
17
35
26
56
57
25
20
53
65
62
22
55
60
17
45
52
63
27
22
43
53
50
17
53
18
47
29
35
58
64
49
56
68
68
46
59
44
59
48
53
47
20
52
31
51
36
47
46
19 Inattention
29
Operating Vehicle in erratic, reckless, careless,
10 negligent, or aggressive manner
21
97 Other improper action
Disregarded traffic signs, signals, road
markings
Inattention
Inattention
Cellular telephone
Inattention
Unknown
Followed too closely
3
19
19
23
19
99
5
4 Failed to yield to right of way
5 Followed too closely
19 Inattention
Disregarded traffic signs, signals, road
3 markings
97 Other improper action
19 Inattention
4
19
6
19
19
Failed to yield to right of way
44
No Improper Driving
17
Operating Vehicle in erratic, reckless, careless,
10 negligent, or aggressive manner
29
4
1
19
4
19
4
Intersection Lyman Street and Worcester Turnpike ; Westborough, MA
January 2009 - December 2011
20
72
58
67
25
18
17
25
48
53
25
39
46
27
84
21
51
41
21
49
45
53
unk
27
30
18
40
46
56
24
17
20
49
57
38
54
48
55
38
63
46
29
40
66
25
24
51
55
41
51
32
32
67
35
43
44
16
35
43
29
44
57
40
48
25
30
37
50
19
41
28
48
33
30
42
21
18
43
52
27
47
32
47
41
89
51
60
63
45
47
36
42
51
38
55
27
Ages
29
Exiting parking lot of Shell Station
Traffic
Exiting parking lot of Buger King
Exiting parking lot of Mobil Station
Operator may have fallen asleep while driving
Exiting parking lot of Mobil Station
Possible slippery road
Exiting parking lot of Bank of America; Traffic
Heavy traffic; 1000 ft from intersection
Vehicle ran though a red traffic light when the
opticon light system was activated
Exiting parking lot of Bank of America
Traffic
Traffic; Exiting Shell Gas Station
Oporator dropped GPS and accedently
accelerated into veh #2
Entering Shell Gas Station
Traffic
Oporator lost control of vehicle due to
excessive speed
Exiting parking lot of Mobil Station
Oporator #1 claims to have green left arrow,
oporator #2 claims to have green ball
Oporator #1's foot slipped off brake
Unaffiliated traffic blocked view
Hit and run
Veh #1 lost control while turning at an
excessive speed
Unaffiliated vehicle stopped suddenly
Oporator was forced to change lanes due to
another crash
Operator failed to stop for red light
Unaffiliated truck blocked view
Exiting parking lot of Dunkin Donuts
Vehicle hit the median barrior
Oporator #2 dropped item on floor and
accedently accelerated
Veh #1 attempted to make a U-turn
Operator claims that his foot slipped off the
Unaffiliated vehicle blocked view
Operator failed to stop for red light
Changed lanes to avoid unaffiliated vehicle
Vehicle went straight on left turn only signal
Operator failed to stop for red light
Exiting Shell Gas. Attempting to cross
three lanes
Veh #2 OUI alcohol
Vehicle went straight on left turn only signal
Exiting Shell Gas Station
Exiting parking lot of Burger King
Exiting parking lot of Mobil Station
Comments
Crash Data Summary Tables and Charts
CRASH MONTH
14%
12%
10%
8%
6%
4%
2%
0%
13%
12%
8%
8%
8%
3%
J
F
M
A
7%
7%
J
A
13%
12%
7%
2%
M
J
S
O
N
D
CRASH DAY OF WEEK
25%
20%
15%
13%
16%
14%
21%
18%
13%
10%
6%
5%
0%
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
CRASH TIME OF DAY
60%
39%
40%
20%
0%
27%
13%
12%
6-10AM
10-2PM
2-6PM
8%
6-10PM
1%
10-2AM
2-6AM
CRASH MANNER OF COLLISION
60%
50%
40%
30%
20%
10%
0%
49%
41%
5%
1%
Single
Vehicle
Crash
Rear-end
Angle
Turnpike Lyman St Collision Diagram Info_7_19_12 (2)
1%
Sideswipe, Sideswipe,
same
opposite
direction
direction
1 of 2
2%
0%
0%
Head on Rear to Rear Unknown
7/27/2012
Crash Data Summary Tables and Charts
CRASH LIGHT CONDITION
71%
80%
60%
40%
20%
0%
22%
Daylight
2%
1%
Dawn
Dusk
Dark Lighted
Roadway
2%
1%
0%
0%
Dark Roadway
not lighted
Dark unknown
roadway
lighting
Other
Unknown
CRASH WEATHER CONDITION
60%
25%
14%
Fog, Smog,
Smoke
0%
0%
Unknown
0%
Other
0%
Severe
Crosswinds
0%
Blowing sand,
snow
1%
Sleet, Hail,
Freezing Rain
Snow
Cloudy
Rain
0%
Clear
70%
60%
50%
40%
30%
20%
10%
0%
CRASH ROAD SURFACE
77%
Water
(standing,
moving)
0%
0%
0%
Unknown
0%
Other
0%
Slush
0%
Sand, mud,
dirt, oil,
gravel
Snow
Wet
0%
Ice
23%
Dry
100%
80%
60%
40%
20%
0%
CRASH DRIVER AGES
30%
25%
20%
20%
10%
0%
22%
14%
9%
15-20
8%
21-29
30-39
Turnpike Lyman St Collision Diagram Info_7_19_12 (2)
40-49
2 of 2
50-59
60-69
1%
1%
70-79
80+
7/27/2012
Road Safety Audit—Route 9 at Lyman Street—Westborough, MA
Prepared by BETA Group, Inc.
Appendix D. Speed Regulations