ROAD SAFETY AUDIT - Welcome to MassDOT · Road Safety Audit—Route 9 at Lyman Street—Westborough, MA . Prepared by BETA Group, Inc. Project Data . A Road Safety Audit for the intersection

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. RSA Meeting Agenda Appendix B. RSA Audit Team Contact List Appendix C. Detailed Crash Data Appendix D. Speed Regulations

List of Figures

Figure 1. Location Map ......................................................................................................................... 3 Figure 2. Location Detail ....................................................................................................................... 4

List of Tables

Table 1. Participating Audit Team Members ....................................................................................... 1 Table 2. Estimated Time Frame and Costs Breakdown ....................................................................... 9 Table 3. Potential Safety Enhancement Summary ............................................................................. 12


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 cross-section 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.

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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 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

Lyman Street at Route 9

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Study Intersection

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Boston Worcester Turnpike (Route 9) at Lyman Street

ROAD SAFETY AUDIT

WESTBOROUGH, MA

Figure 1

Location Map


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

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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.

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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

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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.

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.

Pedestrian and bicyclist crossing Route 9

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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.

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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 Costs

Short-term <1 year Low <$10,000 Mid-term 1–3 years Medium $10,000–$50,000 Long-term >3 years High >$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 through-right 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

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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 short-term, 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 short-term, low cost improvement.

Increase the U-turn area adjacent to the eastbound departure lanes for westbound to eastbound U-turns. 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 short-term, low cost improvement that should also be included in planned improvements.

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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.

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Table 3. Potential Safety Enhancement Summary

Safety Issue Safety Enhancement 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

U-Turn Area Increase the U-turn area adjacent to the eastbound departure lanes for westbound to eastbound U-turn Project Medium Mid-term *

Cobblestone Area Repair the cobblestone area at the nose of the Route 9 medians. MassDOT Medium Short-term $5,000

Lane Control Signs Install R3-8 series graphical lane control signs on all approaches.

MassDOT (Short-term)

Project (Long-term)

Medium Short-term $1,500

* Improvements to be incorporated into the proposed project are assumed to be included as part of the overall project cost.

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Appendix A. RSA Meeting Agenda


Appendix B. RSA Audit Team Contact List


Appendix C. Detailed Crash Data

Top Crash Intersections 2007-2009

WESTBOROUGH

BOSTON WORCESTER TURNPIKE ROUTE 9 LYMAN STREET

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

RANK 185

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• Crash Locations 2007-2009

~ Local Roads

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Top Crash Intersections

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ight

on

left

turn

onl

y si

gnal

O

pera

tor f

aile

d to

sto

p fo

r red

ligh

t

Cha

nged

lane

s to

avo

id u

naffi

liate

d ve

hicl

e

9 11

12

13

14

15

16

17

18

19

21

12

12

12

1 1 1

12/4

/09

12/1

8/09

12

/22/

09

1/14

/10

1/30

/10

1/30

/10

5 5 2 4 6 6

Frid

ay

Frid

ay

Tues

day

Thur

sday

S

atur

day

Sat

urda

y

23

23 4:

16 P

M

11:2

3 P

M

2:37

PM

11

:05

PM

11

:57

AM

11

:16

PM

3 2 3 3 2 3

Ang

le

Rea

r-end

A

ngle

A

ngle

R

ear-e

nd

Ang

le

3 1 1 4 1 4

Dus

k D

aylig

ht

Day

light

D

ark

- lig

hted

road

way

D

aylig

ht

Dar

k - l

ight

ed ro

adw

ay

1 1 1 1 1 1

Cle

ar

Cle

ar

Cle

ar

Cle

ar

Cle

ar

Cle

ar

1 1 1 1 1 1

Dry

D

ry

Dry

D

ry

Dry

D

ry

3 19

19

23

19

99 D

isre

gard

ed tr

affic

sig

ns, s

igna

ls, r

oad

mar

king

s In

atte

ntio

n In

atte

ntio

n C

ellu

lar t

elep

hone

In

atte

ntio

n U

nkno

wn

58

56

53

43

33

19

40

48

25

30

37

50

Una

ffilia

ted

vehi

cle

bloc

ked

view

O

pera

tor f

aile

d to

sto

p fo

r red

ligh

t

Veh

#1

atte

mpt

ed to

mak

e a

U-tu

rn

22

23

24

25

26

2 2/

7/10

7

Sun

day

15 3

:28

PM

2

Rea

r-end

1

Day

light

1

Cle

ar

1 D

ry

5 Fo

llow

ed to

o cl

osel

y 18

19

38

O

pera

tor c

laim

s th

at h

is fo

ot s

lippe

d of

f the

27

2 2/

17/1

0 3

Wed

nesd

ay

9 9:

31 A

M

5 S

ides

wip

e, o

ppos

ite

dire

ctio

n 1

Day

light

1

Cle

ar

2 W

et

19 I

natte

ntio

n 29

57

28

3 3/

5/10

5

Frid

ay

2 2:

10 A

M

3 A

ngle

4

Dar

k - l

ight

ed ro

adw

ay

2 C

loud

y 2

Wet

10

Ope

ratin

g V

ehic

le in

erra

tic, r

eckl

ess,

car

eles

s,

negl

igen

t, or

agg

ress

ive

man

ner

21

44

Veh

icle

hit

the

med

ian

barri

or

29

3 3/

10/1

0 3

Wed

nesd

ay

12 1

2:27

PM

2

Rea

r-end

1

Day

light

1

Cle

ar

1 D

ry

20 D

istra

cted

51

16

O

pora

tor #

2 dr

oppe

d ite

m o

n flo

or a

nd

acce

dent

ly a

ccel

erat

ed

31

3 3 4

3/19

/10

3/22

/10

4/8/

10

5 1 4

Frid

ay

Mon

day

Thur

sday

9 12

14 9:

42 A

M

12:2

5 P

M

2:41

PM

2 2 3

Rea

r-end

R

ear-e

nd

Ang

le

1 1 1

Day

light

D

aylig

ht

Day

light

1 1 2

Cle

ar

Cle

ar

Clo

udy

1 1 1

Dry

D

ry

Dry

5 19

6

Follo

wed

too

clos

ely

Inat

tent

ion

Mad

e an

impr

oper

turn

36

47

46

35

43

29

Exi

ting

park

ing

lot o

f Dun

kin

Don

uts

32

33

34

4 4 4

4/19

/10

4/29

/10

4/29

/10

1 4 4

Mon

day

Thur

sday

Thur

sday

22 8 21 10

:21

PM

8:

15 A

M

9:23

PM

3 3 4

Ang

le

Ang

le

Sid

esw

ipe,

sam

e di

rect

ion

6 1 5

Dar

k, u

nkno

wn

road

way

lig

htin

g D

aylig

ht

Dar

k - r

oadw

ay n

ot li

ghte

d

1 1 1

Cle

ar

Cle

ar

Cle

ar

1 1 1

Dry

D

ry

Dry

4 19

4

Faile

d to

yie

ld to

righ

t of w

ay

Inat

tent

ion

Faile

d to

yie

ld to

righ

t of w

ay

52

31

20

43

44

35

Ope

rato

r fai

led

to s

top

for r

ed li

ght

Una

ffilia

ted

truck

blo

cked

vie

w

35

36

5 7 7 7 8 8 9 9 9 9 10

10

10

11

11

12

12

12

1

5/3/

10

7/13

/10

7/20

/10

7/27

/10

8/14

/10

8/24

/10

9/2/

10

9/3/

10

9/7/

10

9/16

/10

10/1

0/10

10

/15/

10

10/2

8/10

11

/5/1

0 11

/17/

10

12/1

/10

12/1

0/10

12

/14/

10

1/3/

11

1 2 2 2 6 2 4 5 2 4 7 5 4 5 3 3 5 2 1

Mon

day

Tues

day

Tues

day

Tues

day

Sat

urda

y

Tues

day

Thur

sday

Fr

iday

Tu

esda

y Th

ursd

ay

Sun

day

Frid

ay

Thur

sday

Fr

iday

W

edne

sday

W

edne

sday

Frid

ay

Tues

day

Mon

day

8 16

12

12

21 0 17

12

16

10

19 9 11

12

17 9 21

18

13 8:

23 A

M

4:38

PM

12

:04

PM

12

:27

PM

9:

49 P

M

12:2

1 A

M

5:28

PM

12

:29

PM

4:

47 P

M

10:5

9 A

M

7:45

PM

9:

22 A

M

11:3

0 A

M

12:4

4 P

M

5:40

PM

9:

21 A

M

9:52

PM

6:

00 P

M

1:10

PM

4 2 2 2 3 6 2 2 3 2 2 2 2 3 2 3 3 2 3

Sid

esw

ipe,

sam

e di

rect

ion

Rea

r-end

R

ear-e

nd

Rea

r-end

A

ngle

Hea

d on

R

ear-e

nd

Rea

r-end

A

ngle

R

ear-e

nd

Rea

r-end

R

ear-e

nd

Rea

r-end

A

ngle

R

ear-e

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Ang

le

Ang

le

Rea

r-end

A

ngle

1 1 1 1 4 4 1 1 1 1 4 1 1 1 5 1 4 4 1

Day

light

D

aylig

ht

Day

light

D

aylig

ht

Dar

k - l

ight

ed ro

adw

ay

Dar

k - l

ight

ed ro

adw

ay

Day

light

D

aylig

ht

Day

light

D

aylig

ht

Dar

k - l

ight

ed ro

adw

ay

Day

light

D

aylig

ht

Day

light

D

ark

- roa

dway

not

ligh

ted

Day

light

Dar

k - l

ight

ed ro

adw

ay

Dar

k - l

ight

ed ro

adw

ay

Day

light

3 1 2 3 1 3 1 1 1 1 1 2 1 2 2 2 2 1 2

Rai

n C

lear

C

loud

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ain

Cle

ar

Rai

n C

lear

C

lear

C

lear

C

lear

C

lear

C

loud

y C

lear

C

loud

y C

loud

y C

loud

y

Clo

udy

Cle

ar

Clo

udy

2 1 1 1 1 2 1 1 1 1 1 2 1 2 1 2 1 1 1

Wet

D

ry

Dry

D

ry

Dry

Wet

D

ry

Dry

D

ry

Dry

D

ry

Wet

D

ry

Wet

D

ry

Wet

Dry

D

ry

Dry

19

19

19

5 99

2 97

19

4 19

19

5 1 4 19

4 99

99

4

Inat

tent

ion

Inat

tent

ion

Inat

tent

ion

Follo

wed

too

clos

ely

Unk

now

n

Exc

eede

d au

thor

ized

spe

ed li

mit

Oth

er im

prop

er a

ctio

n In

atte

ntio

n Fa

iled

to y

ield

to ri

ght o

f way

In

atte

ntio

n In

atte

ntio

n Fo

llow

ed to

o cl

osel

y N

o Im

prop

er D

rivin

g Fa

iled

to y

ield

to ri

ght o

f way

In

atte

ntio

n Fa

iled

to y

ield

to ri

ght o

f way

Unk

now

n U

nkno

wn

Faile

d to

yie

ld to

righ

t of w

ay

59

48

53

47

29

35

58

64

49

56

68

68

46

59

44

17

53

18

41

51

32

32

67

55

38

63

46

29

40

66

25

24

51

55

57

38

54

Opo

rato

r was

forc

ed to

cha

nge

lane

s du

e to

an

othe

r cra

sh

Hit

and

run

Veh

#1

lost

con

trol w

hile

turn

ing

at a

n ex

cess

ive

spee

d U

naffi

liate

d ve

hicl

e st

oppe

d su

dden

ly

Una

ffilia

ted

traffi

c bl

ocke

d vi

ew

Opo

rato

r #1'

s fo

ot s

lippe

d of

f bra

ke

Opo

rato

r #1

clai

ms

to h

ave

gree

n le

ft ar

row

, op

orat

or #

2 cl

aim

s to

hav

e gr

een

ball

Exi

ting

park

ing

lot o

f Mob

il S

tatio

n

37

38

39

41

42

43

44

45

46

47

48

49

51

52

53

54

55

1 1/

22/1

1 6

Sat

urda

y 11

11:

48 A

M

2 R

ear-e

nd

1 D

aylig

ht

1 C

lear

2

Wet

1

No

Impr

oper

Driv

ing

47

48

51

56

1 1/

26/1

1 3

Wed

nesd

ay

10 1

0:42

AM

3

Ang

le

1 D

aylig

ht

2 C

loud

y 1

Dry

2

Exc

eede

d au

thor

ized

spe

ed li

mit

22

24

Opo

rato

r los

t con

trol o

f veh

icle

due

to

exce

ssiv

e sp

eed

57

1 1/

27/1

1 4

Thur

sday

11

11:

07 A

M

3 A

ngle

1

Day

light

1

Cle

ar

2 W

et

1 N

o Im

prop

er D

rivin

g 43

17

58

2

2/12

/11

6 S

atur

day

11 1

1:19

AM

3

Ang

le

1 D

aylig

ht

1 C

lear

1

Dry

6

Mad

e an

impr

oper

turn

53

20

Tr

affic

59

2

2/12

/11

6 S

atur

day

14 2

:07

PM

2

Rea

r-end

1

Day

light

2

Clo

udy

1 D

ry

19 I

natte

ntio

n 50

49

2 2/

24/1

1 4

Thur

sday

16

4:0

1 P

M

3 A

ngle

1

Day

light

1

Cle

ar

1 D

ry

3 D

isre

gard

ed tr

affic

sig

ns, s

igna

ls, r

oad

mar

king

s 27

56

E

nter

ing

She

ll G

as S

tatio

n

61

3 3/

25/1

1 5

Frid

ay

14 2

:07

PM

4

Sid

esw

ipe,

sam

e di

rect

ion

1 D

aylig

ht

1 C

lear

1

Dry

97

Oth

er im

prop

er a

ctio

n 63

46

62

4 4/

12/1

1 2

Tues

day

16 4

:09

PM

2

Rea

r-end

1

Day

light

2

Clo

udy

1 D

ry

26 O

n-bo

ard

nava

gatio

n sy

stem

22

53

O

pora

tor d

ropp

ed G

PS

and

acce

dent

ly

acce

lera

ted

into

veh

#2

63

4 4/

13/1

1 3

Wed

nesd

ay

11 1

1:06

AM

2

Rea

r-end

1

Day

light

3

Rai

n 2

Wet

1

No

Impr

oper

Driv

ing

55

unk

64

4 4/

23/1

1 6

Sat

urda

y 16

4:3

2 P

M

3 A

ngle

1

Day

light

3

Rai

n 2

Wet

18

Vis

ibilit

y O

bstru

cted

60

27

Tr

affic

; Exi

ting

She

ll G

as S

tatio

n 65

4

4/30

/11

6 S

atur

day

9 9:

26 A

M

2 R

ear-e

nd

1 D

aylig

ht

2 C

loud

y 1

Dry

19

Ina

ttent

ion

17

30

66

5 5/

2/11

1

Mon

day

16 4

:31

PM

2

Rea

r-end

1

Day

light

1

Cle

ar

1 D

ry

19 I

natte

ntio

n 45

18

Tr

affic

67

5

5/31

/11

2 Tu

esda

y 17

5:1

8 P

M

3 A

ngle

1

Day

light

1

Cle

ar

1 D

ry

19 I

natte

ntio

n 52

40

68

6 6/

8/11

3

Wed

nesd

ay

16 4

:08

PM

2

Rea

r-end

1

Day

light

1

Cle

ar

1 D

ry

9 Fa

ilure

to k

eep

in p

rope

r lan

e or

runn

ing

off

road

20

41

69

6

6/22

/11

3 W

edne

sday

14

2:2

9 P

M

2 R

ear-e

nd

1 D

aylig

ht

3 R

ain

2 W

et

5 Fo

llow

ed to

o cl

osel

y 53

21

7

7/8/

11

5 Fr

iday

15

3:3

7 P

M

3 A

ngle

1

Day

light

2

Clo

udy

1 D

ry

19 In

atte

ntio

n 65

49

E

xitin

g pa

rkin

g lo

t of B

ank

of A

mer

ica;

Tra

ffic

71

8 8/

8/11

1

Mon

day

17 5

:21

PM

2

Rea

r-end

1

Day

light

1

Cle

ar

1 D

ry

1 N

o Im

prop

er D

rivin

g 62

45

42

H

eavy

traf

fic; 1

000

ft fro

m in

ters

ectio

n

72

8 8/

10/1

1 3

Wed

nesd

ay

23 1

1:01

PM

3

Ang

le

4 D

ark

- lig

hted

road

way

2

Clo

udy

2 W

et

10 O

pera

ting

Veh

icle

in e

rratic

, rec

kles

s, c

arel

ess,

ne

glig

ent,

or a

ggre

ssiv

e m

anne

r 26

27

V

ehic

le ra

n th

ough

a re

d tra

ffic

light

whe

n th

e op

ticon

ligh

t sys

tem

was

act

ivat

ed

73

8 8/

22/1

1 1

Mon

day

15 3

:47

PM

3

Ang

le

1 D

aylig

ht

1 C

lear

1

Dry

4

Faile

d to

yie

ld to

righ

t of w

ay

56

84

Exi

ting

park

ing

lot o

f Ban

k of

Am

eric

a 74

8

8/23

/11

2 Tu

esda

y 17

5:5

4 P

M

3 A

ngle

1

Day

light

1

Cle

ar

1 D

ry

99 U

nkno

wn

57

21

75

9 9/

16/1

1 5

Frid

ay

16 4

:30

PM

2

Rea

r-end

1

Day

light

1

Cle

ar

1 D

ry

19 In

atte

ntio

n 25

51

36

29

76

9 9/

29/1

1 4

Thur

sday

13

1:1

5 P

M

2 R

ear-e

nd

1 D

aylig

ht

3 R

ain

1 D

ry

11 S

wer

ving

or a

void

ing

due

to w

ind,

slip

pery

su

rface

, veh

icle

, obj

ect,

non-

mot

oris

t in

road

way

, etc

. 35

46

77

10

10/2

/11

7 S

unda

y 13

1:2

6 P

M

2 R

ear-e

nd

1 D

aylig

ht

3 R

ain

2 W

et

3 D

isre

gard

ed tr

affic

sig

ns, s

igna

ls, r

oad

mar

king

s 33

20

P

ossi

ble

slip

pery

road

78

10

10

/5/1

1 3

Wed

nesd

ay

11 1

1:00

AM

2

Rea

r-end

1

Day

light

1

Cle

ar

1 D

ry

19 In

atte

ntio

n 42

72

79

10

10

/13/

11 4

Th

ursd

ay

16 4

:19

PM

2

Rea

r-end

1

Day

light

3

Rai

n 2

Wet

5

Follo

wed

too

clos

ely

44

58

10

10/2

2/11

6

Sat

urda

y 6

6:29

AM

2

Rea

r-end

2

Daw

n 1

Cle

ar

1 D

ry

1 N

o Im

prop

er D

rivin

g 26

67

O

pera

tor m

ay h

ave

falle

n as

leep

whi

le d

rivin

g 81

10

10

/22/

11 6

S

atur

day

15 3

:52

PM

3

Ang

le

1 D

aylig

ht

2 C

loud

y 1

Dry

1

No

Impr

oper

Driv

ing

42

25

Exi

ting

park

ing

lot o

f Mob

il S

tatio

n 82

10

10

/31/

11 1

M

onda

y 20

8:2

6 P

M

2 R

ear-e

nd

4 D

ark

- lig

hted

road

way

2

Clo

udy

1 D

ry

4 Fa

iled

to y

ield

to ri

ght o

f way

17

18

83

11

11

/11/

11 5

Fr

iday

15

3:2

8 P

M

3 A

ngle

1

Day

light

1

Cle

ar

1 D

ry

19 In

atte

ntio

n 31

17

E

xitin

g pa

rkin

g lo

t of M

obil

Sta

tion

84

12

12/1

/11

4 Th

ursd

ay

22 1

0:24

PM

2

Rea

r-end

4

Dar

k - l

ight

ed ro

adw

ay

1 C

lear

1

Dry

5

Follo

wed

too

clos

ely

21

25

85

12

12/6

/11

2 Tu

esda

y 15

3:4

0 P

M

3 A

ngle

1

Day

light

3

Rai

n 2

Wet

4

Faile

d to

yie

ld to

righ

t of w

ay

28

48

45

Exi

ting

park

ing

lot o

f She

ll S

tatio

n 86

12

12

/7/1

1 3

Wed

nesd

ay

17 5

:49

PM

2

Rea

r-end

4

Dar

k - l

ight

ed ro

adw

ay

3 R

ain

2 W

et

1 N

o Im

prop

er D

rivin

g 58

53

47

Tr

affic

87

12

12

/8/1

1 4

Thur

sday

17

5:1

3 P

M

3 A

ngle

4

Dar

k - l

ight

ed ro

adw

ay

1 C

lear

1

Dry

19

Inat

tent

ion

25

25

Exi

ting

park

ing

lot o

f Bug

er K

ing

88

12

12/2

2/11

4

Thur

sday

13

1:3

1 P

M

2 R

ear-e

nd

1 D

aylig

ht

1 C

lear

1

Dry

1

No

Impr

oper

Driv

ing

17

39

Sum

mar

y ba

sed

on C

rash

Rep

orts

obt

aine

d fro

m th

e W

estb

orou

gh P

olic

e D

epar

tmen

t

12% 12%

8% 8% 8% 7% 7% 7%

3% 2%

Crash Data Summary Tables and Charts

CRASH MONTH

13%14% 12% 10% 8% 6% 4% 2% 0%

13%

J F M A M J J A S O N D

CRASH DAY OF WEEK 25% 20% 15% 10% 5% 0%

18% 21%

13% 14% 16%

13%

6%

Monday Tuesday Wednesday Thursday Friday Saturday Sunday

CRASH TIME OF DAY 60%

40%

20%

0%

39%

13% 27%

12% 8% 1%

6-10AM 10-2PM 2-6PM 6-10PM 10-2AM 2-6AM

CRASH MANNER OF COLLISION

60% 50% 40% 30% 20% 10%

0%

49% 41%

5%1% 1% 2% 0% 0% Single Rear-end Angle Sideswipe, Sideswipe, Head on Rear to Rear Unknown Vehicle same opposite Crash direction direction

Turnpike Lyman St Collision Diagram Info_7_19_12 (2) 1 of 2 7/27/2012

22% 2% 1% 2% 1% 0% 0%

25% 14%

0% 1% 0% 0% 0% 0% 0%

Crash Data Summary Tables and Charts

CRASH LIGHT CONDITION 71%80%

60% C

lear

Dry

Clo

udy

Wet

Rai

n

Sno

w Ice

Sno

w

Sle

et, H

ail,

Free

zing

Rai

n

San

d, m

ud,

dirt,

oil,

grav

elFo

g, S

mog

,S

mok

e

Wat

er(s

tand

ing,

Sev

ere

mov

ing)

Cro

ssw

inds

Slu

shB

low

ing

sand

,sn

ow

Oth

erO

ther

Unk

now

n U

nkno

wn

30%

20%

10%

0%

80% 60% 40% 20%

0%

CRASH ROAD SURFACE

100%

70% 60% 50% 40% 30% 20% 10%

0%

40% 20% 0%

15-20 21-29 30-39 40-49 50-59 60-69 70-79 80+

Daylight Dawn Dusk Dark - Dark - Dark - Other Unknown Lighted Roadway unknown

Roadway not lighted roadway lighting

CRASH WEATHER CONDITION

60%

20% 25%

22%

9% 14%

8%

1% 1%

77%

23% 0% 0% 0% 0% 0% 0% 0%

CRASH DRIVER AGES

Turnpike Lyman St Collision Diagram Info_7_19_12 (2) 2 of 2 7/27/2012


Appendix D. Speed Regulations

Documents

ROAD SAFETY AUDIT - Welcome to MassDOT · Road Safety Audit—Route 9 at Lyman Street—Westborough, MA . Prepared by BETA Group, Inc. Project Data . A Road Safety Audit for the intersection