ROADSAFETYAUDIT
I‐495/Route117Interchange
TownofBolton
August2013
Preparedfor:
MassachusettsDepartmentofTransportationHighwayDivision
Preparedby:
GreenInternationalAffiliates,Inc.
TABLE OF CONTENTS
Background of Project .................................................................................................................................. 1
Project Data................................................................................................................................................... 1
Project Location Description ........................................................................................................................ 1
Safety Issue #1.
Intersection Geometry/Sight Distance .......................................................................... 4
Safety Issue #2.
Optimized Signalization and Coordination ................................................................... 7
Safety Issue #3.
Road and Ramp Capacity.............................................................................................. 8
Safety Issue #4.
Motorist Guidance/Signage........................................................................................... 9
Safety Issue #5.
Pavement Markings..................................................................................................... 11
Safety Issue #6.
Maintenance, Drainage and Ponding Issues................................................................ 12
Safety Issue #7.
Bike and Pedestrian Accommodations........................................................................ 13
Summary ..................................................................................................................................................... 14
LIST OF APPENDICES
Appendix A – RSA Meeting Agenda ......................................................................................................... 16
Appendix B – RSA Audit Team Sign In Sheet........................................................................................... 16
Appendix C- Detailed Crash Data .............................................................................................................. 16
Appendix D- Traffic Volume Data ............................................................................................................. 16
Appendix E- Existing Conditions Plan ....................................................................................................... 16
LIST OF TABLES
Table 1 Road Safety Audit Team Members.................................................................................................. 2
Table 2- Safety Enhancement Summary..................................................................................................... 15
LIST OF FIGURES
Figure 1- Project Location ............................................................................................................................ 3
Figure 2- Eastbound view on Route 117 at I-495 NB Ramps....................................................................... 5
Figure 3- I-495 View of queue on I-495 off-ramp........................................................................................ 8
Figure 4- I-495 SB right turn slip ramp ........................................................................................................ 9
Figure 5- I-495 NB sign in EB direction..................................................................................................... 10
Figure 6- Plaza southeast of I-495 NB ramps ............................................................................................. 11
Figure 7- Ponding at Route 85 .................................................................................................................... 12
Figure 8- Pavement markings east of Route 85 .......................................................................................... 13
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
Prepared by Green International Affiliates, Inc.
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BACKGROUND OF PROJECT
This Road Safety Audit (RSA) focuses on identifying safety issues and possible enhancements for
safety improvements within the interchange of Interstate 495 (I-495) and Route 117/Main Street
(RT117). This interchange is currently in the 25% Design stage, as a Massachusetts Department of
Transportation (MassDOT) project, and is eligible to receive Highway Safety Improvement Program
(HSIP) funding based on the high reported crashes between 2006-2008 crash data of 132 crashes.
This area has been of significant concern to both the State Police, MassDOT, and the local
communities as it continues to exhibit less than desirable safety characteristics. As a result of the
continued concern in the project area, MassDOT initiated a planning/ preliminary design study to
develop short and long term solutions. This RSA was conducted as part of the safety assessments
for the project.
The safety audit team is composed of representatives from MassDOT Boston, MassDOT District 3,
Boston Region Metropolitan Planning Organization (Boston Region MPO), Bolton Police
Department, Town of Bolton, Stow Fire Department and Green International Affiliates, Inc. (Green).
I-495 NB ramps were recently signalized by MassDOT, however the interchange continues to have
high number of crashes. Green’s role is to conduct the RSA meeting and effectively outline the
team’s observations and suggestions for safety improvements.
PROJECT DATA
The audit team, listed in Table 1 along with their affiliation, conducted an RSA on Wednesday, May
29th, 2013 for the interchange of Route 117 and I-495. The agenda for this meeting can be found in
Appendix A.
PROJECT LOCATION DESCRIPTION
This RSA evaluates safety issues of the I-495 and Route 117 interchange in Bolton, MA. As seen in
Figure 1, the intersections included in this interchange area are as follows:

Route 117, I-495 Southbound Ramps and Sugar Road (RT 117/I-495 SB/Sugar Rd)

Route 117 and I-495 Northbound Ramps (RT 117/I-495 NB)

Route 117 and Route 117 (RT 117/RT 85)
The project location with respect to nearby interchanges on I-495 is shown in Figure 1. The project
area is located in a rural environment off of Exit 27 off of I-495. Currently the intersections at the
two I-495 ramps are signalized and the RT 117/RT 85 intersection is STOP controlled. Route 117 is
a two lane road functioning as a minor arterial and Route 85 is a two lane major collector. The
posted speed limit is 40mph for Route 117 within the project limits and is 25mph for both
Northbound (NB) and Southbound (SB) ramps, Sugar Road and Route 85. All roads are town
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
Prepared by Green International Affiliates, Inc.
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owned and maintained with the exception of the road section within the interchange area including
the two traffic signals, which are under the jurisdiction of MassDOT.
Table 1 Road Safety Audit Team Members
Road Safety Audit Team Member
Title
Organization/Affiliation
Lisa Schletzbaum
Traffic Safety Engineer
MassDOT- Boston
Corey O’Connor
Traffic Safety Engineer
MassDOT- Boston
Sean Sullivan
Traffic Safety Intern
MassDOT- Boston
Lola Campbell
Assistant District Traffic Engineer
MassDOT Traffic Division District 3
Mark Abbott
Project Manager
Boston Region MPO
Don Lowe
Bolton Town Administrator
Town of Bolton
Harold E. Brown
Director of Public Works
Town of Bolton
Vincent Alfano
Chief of Police
Bolton Police Department
Lorraine Kenney
Administrator Assistant Coordinator
Bolton Police Department
Mike McLaughlin
Fire Chief
Stow Fire Department
Bill Scully
Director of Transportation Planning
Green International Affiliates, Inc.
Shahin Shahin
Senior Associate
Green International Affiliates, Inc.
Wing Wong
Transportation/Civil Engineer
Green International Affiliates, Inc.
Nadia Bosan
Transportation/Civil Engineer
Green International Affiliates, Inc.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
Prepared by Green International Affiliates, Inc.
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FIGURE1
1:1 GREEN INTERNATIONAL AFFILIATES, INC.
L:.IJ
CiVIL AND STRucnJRAL ENGINEERS
STUDY AREA
1·495/ROUTE 1171mRCHANGE IMPROVEMENT STUDY
BOLTON,MA
ROAD SAFETY AUDIT OBSERVATIONS
In conducting the I-495/Route 117 Interchange Road Safety Audit, safety issues and possible
corrective actions to reduce the safety risk were determined based on team discussions and field
observations on Wednesday, May 29th, 2013. Safety issues that were identified included:
 Signalization Optimization and Coordination;
 Route 85 island and road geometry;
 I-495 NB Ramps queuing onto I-495 breakdown lane;
 I-495 NB ramps geometry and westbound traffic visibility;
 Route 117 truck and general capacity;
 High percentage of truck usage;
 Misuse of lanes by motorists;
 Vehicle queuing heading eastbound in the morning peak hour and westbound in the
evening peak hour.
Many of these issues can or need to be addressed by long term solutions, but some could be
addressed in the short term. The following paragraphs describe the issues and possible actions.
The identified issues by the RSA team have some similarities and commonalities and consequently,
were grouped into major categories.
SAFETY ISSUE #1.
INTERSECTION GEOMETRY/SIGHT DISTANCE
Observations:
RT 117/I-495 SB/Sugar Rd
In the morning peak hour, queues west of Sugar Road can extend towards the office parks
approximately 1,200 feet west of I-495 SB. It was noted by team members that the eastbound right
turning vehicles are not able to get to the channelized right turn because they are at the back of the
long queues., which may attribute to reported crashes west of the project area. The geometry of the
right turn off-ramp seems to encourage high turn speed and vehicles encroach on Route 117
centerline.
RT 117/I-495 NB
The highest percentage of crashes occurs at the intersection of RT 117/I-495 NB. These have
typically been rear-end type from right turning vehicles exiting I-495. Police noted three different
scenarios they have observed from these accidents: 1) Motorists having to look ‘behind them’ to see
westbound thru traffic and collide with vehicles that have not left the queue in front of them; 2)
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
Prepared by Green International Affiliates, Inc.
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Motorists using the left turn lane on the I-495 NB ramps to turn right onto Route 117, bypassing the
right turn queue and causing conflicts with vehicles turning right in the right turn lane; and 3)
Motorists using the right turn lane as two lanes, and try to turn simultaneously. In summary, the
geometry/angle of entry of the right turn ramp lane at Route 117 westbound and the width (or lack
of markings) on the left turn lane were likely factors related to the above.
It was also noted by the team members that the
trees located in the northwest quadrant of the
ramps within the loop obscure the view of the
queue on Route 117 from vehicles on the ramp
exiting I-495 northbound. When driving on the
off-ramp team members noted that the turning
radius leaving I-495 seemed too sharp of a turn,
did not have roadway delineation (chevron
signs) or an exit speed warning sign.
Figure 2- Eastbound view on Route 117 at I-495 NB Ramps
RT 117/RT 85
Accidents that occur at Route 85 are mainly angle type with the Northbound left movement and
vehicles on Route 117. Several rear-end type accidents on Route 117 occurred from vehicles
stopping short for vehicles exiting Route 85. It was observed that when driving on the Route 85
approach, it was noted that a tendency could exist to drive to the left of the island possibly due to
the geometry or level of guidance; which may cause vehicles to exit Route 85 at less advantageous
angles and risk a head-on collision with a vehicle turning onto Route 85 from Route 117. Trucks
have been noted to crossover the island when turning left from Route 85. Town officials noted that
there may be many crashes into the island.
Perennial landscaping within the island, located to the left of the left turning vehicles on Route 85,
is tall and obstructs the vision of looking to the west. There is also a utility pole located within the
island that obscures the view of eastbound vehicles from vehicles turning left onto Route 117 from
Route 85. It was also observed that bushes on the eastern corner can also obscure the view of
westbound through motorists from motorists turning left at the Route 85 approach.
The geometry on the corner rounding from Route 117 eastbound to Route 85 Southbound is poorly
defined. While truck turning must be accommodated from both eastbound and westbound
directions, the current conditions have resulted in an unpaved area with rutting and ponding
occurring. The area is sometimes used by trucks for a rest area and these parked trucks may block
visibility of drivers exiting RT 85.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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Finally, it was noted that the angle of intersection is somewhat less than 90 degrees that may create
some turning difficulties.
Enhancements:
1. A lane can be added to the eastbound Route 117 approach to the channelized right turn
onto I-495 SB ramps which may alleviate eastbound rear-end type accidents occurring to
the west of the project area. This extension can make the I-495 SB on-ramp more accessible
during peak hours.
2. Trees within the inner loop of the I-495 NB off-ramp can be removed and/or trimmed back
to increase visibility for motorists exiting I-495.
3. The I-495 NB ramp advisory speed can be reviewed to determine if it is the correct speed to
use for the I-495 NB ramp radius, and determine the need to install additional delineation.
4. The I-495 NB off ramp can be modified to have two lanes turning right and an add-lane can
be designed for vehicles to exit onto more efficiently to accommodate high right turning
volumes; by allowing left turn vehicles to exit in their own lane, this in turn will reduce the
number of vehicles waiting to exit.
5. Alignment at Route 85 can be modified to form a 90 degree angle and better accommodate
vehicles approaching Route 117 to turn left. The island can also be modified (i.e. cutback
nose) to eliminate any obstruction from the left turning movement.
6. Landscaping within the island on Route 85 can be trimmed, replaced with low growing
shrubs or eliminated to improve visibility for exiting motorists. The pole located on the
island could be relocated.
7. Bolton regulations allow for landscaping to be removed or trimmed if it causes safety issues,
except for the plants that were grandfathered in because they were planted before the
regulation was passed. Landscaping located on east corner of Route 85 at Route 117 should
be trimmed or removed; however, this may require working with homeowner if outside the
public layout.
8. At the intersection of Route 117 and Route 85, define right turn pavement/curb edge for
western corner of intersection.
9. Add warning signage on I-495 NB approach to exit ‘EXPECT BACKUPS BETWEEN 4PM-6PM’
to address the inability for motorists to see ‘around’ the corner during peak hours.
10. Provide painted gore with hash lines and warning signage such as “KEEP RIGHT” on Route
85 to notify northbound vehicles that have a natural inclination to drive left of the
approaching island.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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SAFETY ISSUE #2.
OPTIMIZED SIGNALIZATION AND COORDINATION
Observations:
RT 117/I-495 SB/Sugar Rd
A major issue throughout the Route 117 area is the peak period congestion at the two signals of RT
117/I-495 SB/Sugar Rd and RT 117/I-495 NB. At Sugar Road, approximately 70% of reported
eastbound and westbound accidents on Route 117 are due to vehicles not being able to turn left
onto Sugar Road from Route 117 because there is no protected phase and an inadequate number of
gaps in the westbound flow, particularly during the PM peak period. With the high morning and
evening peak hour volume on Route 117 at this location, left turning motorists attempt to make the
turn and are hit by oncoming traffic.
It was noted by team members that the green light timing is unused at Sugar Road when vehicles
turn right onto Route 117 from Sugar Road (i.e. turn on RED) and the approach continues to receive
the green light when there is no demand. Green time should not be given to Sugar Road when there
are no vehicles present. As a result, vehicles on Route 117 are delayed unnecessarily for Sugar
Road that has no vehicles on it with the queue building up and affecting the relative safety risk.
RT 117/I-495 NB
Similar to RT 117/I-495 SB/Sugar Rd, the signal at the I-495 NB ramps also has wasted green time
for the left turn movement from Route 117 onto the I-495 NB on-ramp. Vehicles have completed
their turn during the permitted phase, and the protected phase activates after there are no vehicles
in the turn lane. This delays westbound traffic and this may contribute to the long westbound
queue that forms, particularly during the PM peak period.
Westbound queues, due to the signal at the I-495 SB ramps, extend onto the I-495 NB ramps and
periodically into the breakdown lane of I-495. This is a safety issue for vehicles traveling through
on I-495 as well as motorists queued to exit the highway.
RT 117/RT 85
Similarly to RT 117/I-495 SB/Sugar Rd Eastbound left turning vehicles, approximately 25% of
reported crashes at the RT 117/RT 85 intersection are directly related to left turning vehicles
exiting Rout 85, this may be due to having inadequate number of gaps to complete the turn. This
location is currently stop controlled, and posted speed limits for the Route 117 Eastbound and
Westbound approach is 40 mph. The current conditions indicate difficulty for vehicles to exiting
Route 85 to safely cross Route 117 into the westbound lane, particularly during the peak periods.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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Enhancements:
1. ThesignalatRT117/I‐495SB/SugarRdintersectionandthesignalattheRT117/I‐495NB
intersectionareintendedtobecoordinatedandthisshouldbechecked.
2. Verify ifSugarRoadcrash history warrants a short protected phase fortheRoute117EB
left turn movement at Sugar Road. This may also require an evaluation of existing
equipmentcapability.
3. Optimizethesignaltimingforthe twoexistingRoute117signalizedintersections.
4. Verify that the existing detection equipment is functioning correctly at the intersections.
Considerinstallingsomedelaytothe SugarRoad approachso that ifthevehiclewaitinghas
left,theSugarRoad/I‐495SBapproachwillbeskipped.
5. ImprovethetrafficcontrolattheRT117/RT85intersection.Atthistime,thiscouldinclude
Evaluating if Route 85 meets MUTCD warrants for a signal at RT 117/RT 85 and possibly
coordinatewiththeexistingsignalstosafelyaccommodateleftturningvehicles.
6. Evaluate the feasibility of a roundabout at Route 85 and see if acquisition of land is
required.
SAFETYISSUE#3.
ROADANDRAMPCAPACITY
Observations:
Itwasnotedbyteammembersthatthewestboundqueues on Route117duringtheeveningpeak
hourcan extendtoas farasStow.Asmentioned previously,the I‐495NBrampsregularlyextend
onto I‐495 intothebreakdown lane; thismainly
occurs during the evening peak hour. While
reported crashes along I‐495 NB were not
obtained for this audit to determine the extent
of the safety issue for vehicles queuing on I‐495,
visualobservations ofthiswas discussedduring
the meeting and it is considered a safety issue.
This issuemaybeduetovehicle limitedcapacity
onRoute117andtheramps.
Itwas alsomentionedatthemeetingthatthere
potentially is a development that could be
located opposite the I‐495 NB ramps with
accesstoRoute117.
Figure3‐I‐495ViewofqueueonI‐495off‐ramp
RoadSafetyAudit‐I‐495/Route117Interchange,Bolton,MA
Prepared by Green International Affiliates, Inc.
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Enhancements:
1. Determine if the current two lane road is sufficient for Route 117 and for Route 85, or if
there is a need for additional lanes.
2. Determine if new routes need to be recommended through signage along Route 2 for
vehicles trying to reach Stow, Hudson, Leominster and/or Lancaster and avoid using Route
117 as a cut through route, particularly related to truck traffic. When determining
appropriate signage, it should be noted that the location of numbered routes in other
communities should be clearly stated, otherwise these signs might be ineffective.
3. If future development is built to the east of I-495 NB ramps, then the Town should work
with the developer to incorporate improvements to accommodate new traffic and/or any
geometry improvement.
SAFETY ISSUE #4.
MOTORIST GUIDANCE/SIGNAGE
Observations:
Route 117
It has also been noted that trucks and vehicles use the side of the road on Route 117 to park.
Vehicles also park in this location when funerals and burials occur at the cemetery on the north side
of the project, presumably to use the convenience store located directly across Route 117 from the
cemetery. There are currently no reported crashes due to these parked vehicles, but it can offset
visibility and/or capacity of the roadway. It is also not an ideal pedestrian crossing location that
results with the trucks parking. There are currently signs in this area for NO PARKING, but some
are faded beyond recognition.
RT 117/I-495 SB/Sugar Rd
Currently there is only one yield sign (R1-2) for the
I-495 SB off-ramp located on the left side of the
right turn lane. When vehicles pull up to Route
117, this yield sign is located behind the driver’s
line of sight, which is not an ideal location.
Figure 4- I-495 SB right turn slip ramp
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
Prepared by Green International Affiliates, Inc.
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RT 117/I-495 NB
As mentioned earlier, some vehicles on the I-495
NB off-ramp use the left turn lane to bypass the
right turn queue and turn right onto Route 117.
According to local police, this has caused safety
issues and accidents in the past. The Bolton Police
Department has noted that there currently are no
signs for I-495 NB ramps to define land use and to
deter vehicles from making this maneuver so they
are unable to enforce the law.
The I-495 NB sign is also being blocked by the
new signal installed for eastbound vehicles.
Figure 5- I-495 NB sign in EB direction
RT 117/RT 85
As indicated on the collision diagram and during discussions with RSA team members, a number of
accidents may have occurred due to motorists being unaware of the advanced intersection.
Currently there is a worn STOP AHEAD sign, and no warnings for this intersection on the Route 117
approach.
Enhancements:
1. Signs that are no longer distinguishable can be removed and replaced with new signs where
necessary. This also includes replacing the STOP AHEAD sign on Hudson Road and the NO
PARKING signs on Route 117 abutting the cemetery. New parking signs at the cemetery can
state “NO PARKING EXCEPT FOR CEMETERY USE” to clarify when parking at this location is
permitted.
2. Install an intersection ahead (W2-2) sign along with Hudson Road street name (D3-1) sign
for guidance along Route 117.
3. An additional YIELD sign (R1-2) can be installed on the I-495 SB off-ramps on the right side,
and/or the existing sign can be adjusted to increase motorist awareness.
4. Relocate the I-495 NB guide sign on Route 117 facing eastbound traffic at the I-495 NB onramp to improve its visibility.
5. Install indicating LEFT LANE MUST TURN LEFT (R3-7) with arrow and ONLY pavement
markings or NO RIGHT TURN (R3-1) on the I-495 NB off-ramp left turn lane.
6. Add NO PARKING signs on west side Route 85 just beyond the corner rounding from Route
117.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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7. As noted above, install EXPECT BACKUPS BETWEEN 4PM-6PM on the I-495 mainline in the
Northbound direction approaching the Route 117 off-ramp.
SAFETY ISSUE #5.
Observations:
PAVEMENT MARKINGS
Route 117
Narrow shoulders were noted along the roadway within the project area. These do not meet
minimum widths to accommodate bicycles for through intersection area.
RT 117/I-495 SB/Sugar Rd
Due to the heavy congestion at the Sugar Road and I-495 SB signal, westbound vehicle queue
extend back towards the bridges. From the end of this westbound left turn lane to the I-495
bridges. From the end of this westbound left turn lane to the I-495 bridges, the westbound direction
becomes one wide lane with no pavement markings distinguishing between the left turn lane and
the through lane, but the width of the road allows vehicles heading westbound to move around
those stopped in the queue. Motorists should remain in the single lane and not bypass the queue to
reach the left turn lane. It is technically a violation of the rules of the road. However, the movement
occurs and it can create a potential safety hazard and confusion for motorists waiting in the queue.
RT 117/I-495 NB
Near the vicinity of the I-495 NB ramps is a small plaza.
It has been noted that vehicles have a hard time
turning out of this site based on the tire markings and
the condition of the island between the two
entrance/exits. This behavior may contribute to the
reported crashes on the segment between I-495 NB
ramps and Route 85. There are currently no pavement
markings or signs distinguishing where the entrance
and exits are at this location.
As discussed previously, queues at RT 117/I-495 NB
Figure 6- Plaza southeast of I-495 NB ramps
intersection extend into the breakdown lane of I-495.
The off-ramp lane currently cannot accommodate the length of the queue that develops onto I-495.
Enhancements
1. Extend Route 117 westbound left turn lane on approach to I-495 SB on-ramp.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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2. Evaluate the lane markings along Route 117 to create wider shoulders (i.e. 4 to 5 feet if
possible) to better accommodate bicyclists and reduce safety risks for this mode.
3. Coordination with owner of plaza can be made to add pavement markings to distinguish
entrance/exit. If lane widths are not efficient enough for trucks to enter and exit the plaza
without driving over the island, then the island can also be modified to accommodate
trucks.
4. As noted above, install left turn arrow and the legend ONLY on the I-495 NB off-ramp left
turn lane to enforce the primary usage of this left lane, and to help deter vehicles from
turning right from the left lane.
5. Install pavement markings to distinguish between lanes on I-495 to accommodate queue
formed at the intersection of RT 117/I-495 NB for I-495 NB off ramp.
SAFETY ISSUE #6.
Observations:
MAINTENANCE, DRAINAGE AND PONDING ISSUES
Most of the reported accidents occurred
during wet weather conditions, and it was
observed that the road had ponding issues on
Route 117 approaching Route 85 along with
potholes where trucks habitually park. Over
time the pavement and unpaved area can
develop ruts and depressions from the heavy
vehicles parked on the side of the road.
During wet weather ponding occurs and
obscures the potholes from vehicles and
motorcyclist traveling in the project area
increasing the relative safety risk. There were
Figure 7- Ponding at Route 85
other ponding areas along sections of the
road. It was also noted that the drainage
structures within the project area are in need of cleaning and maintenance.
Enhancements:
1. Patch areas of roadway where potholes are located.
2. The area on the west side of Route 85 at the intersection with Route 117 should be modified
to better define the pavement edge but to allow for appropriate truck maneuvering.
3. Provide curbing along edge of road on Route 117 and Route 85 on the southeast side of the
intersection and wherever necessary to deter trucks and other vehicles from parking. The
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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area beyond the curbing can could be seeded and landscaped which would deter vehicles
from using as a parking area.
4. Lower and clean out drainage structures to accommodate ponding areas where necessary.
SAFETY ISSUE #7.
Observations:
BIKE AND PEDESTRIAN ACCOMMODATIONS
There are minimal or no accommodation for
pedestrians and bicyclists within the project
area with narrow shoulders and the sidewalk
limited to a short section under the bridges on
the north side of Route 117. The sidewalk does
not connect to anything nor are crosswalks
defined to guide pedestrians to the other side of
the street. It was noted by team members that
the majority of pedestrian movement occurs
west of the project area. Bicyclist are frequent
users along the corridor, several were observed
traveling eastbound during the audit and
Figure 8- Pavement markings east of Route 85
according to local RSA participants, a half
dozen organized rides pass through the town each year. Pedestrians are not able to safely cross the
RT 117/I-495 SB/Sugar Rd intersection.
Enhancements:
1. Install sidewalks along the south side of the project area and handicap ramps at the
intersections.
2. Install traffic signal that provides pedestrian phase for safer crossing at the intersection of
RT 117/I-495 SB/Sugar Road once the sidewalks are in place.
3. Evaluate an appropriate location for crosswalks within the project area, such as at the
intersection of RT 117/I-495 SB/Sugar Road, at the intersection of RT 117/RT 85 and from
the convenience store to cemetery for safer pedestrian crossing. Install ADA compliant
handicap ramps and sidewalks where it is determined appropriate to install crosswalks.
4. Restripe the roadway to provide wider shoulders to better accommodate bicycles along
both sides of Route 117.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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SUMMARY
Based on the audit team members review of observations and discussions, issues and possible
solutions were identified that could reduce the safety risk at the three study intersections on the I495 interchange ramps connecting with Route 117 in Bolton, MA.
Table 2 summarizes the issues and potential enhancements to address the issues along with the
estimated safety payoff, time frame, cost, and responsibility. These criteria are categorized by the
following estimates and descriptions:
 Safety Payoff: enhancement can improve the safety of the interchange by a low (<30%),
medium (30% - 70%), and high (>70%)
 Time frame: project can be completed within three different categories of time frame
which are short-term (<1 year), mid-term (1-3 years) or long-term (>3 years)
 Cost: cost is estimated to be within three categories of cost which are low ($10,000),
medium ($10,001-$50,000) or high (>$50,000)
 Responsibility: which entity or organization will be responsible for completing work.
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
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Table 2‐ Proposed Safety Enhancement Summary
Safety Issue
Intersection Geometry/Sight Distance
Optimized Signalization and Coordination
Description of Issues
Long eastbound queues form in the morning peak, that prevent vehicles from accessing I‐495 SB channelized right turn
Vehicles cannot see queue traffic on Route 117 at I‐495 NB ramps
Vehicles travel on ramps at high speeds
Safety Enhancment
Install additional lane to eastbound approach to I‐495 SB channelized right turn
Trim trees for increased visibility
Review of ramp radius for speeds
Low
Long‐Term
Mid
MassDOT
Mid
Low
Short‐Term
Short‐Term
Low
Low
MassDOT
MassDOT
Vehicles use the one lane slip ramp at I‐495 NB ramp as two lanes
Evaluate modfiying I‐495 NB ramp to have an additional right turn lane
High
Long‐Term
High
MassDOT
Mid
Mid‐Term
High
MassDOT/ Town of Bolton
Low
Short‐Term
Low
Town of Bolton
Route 85 has a natural inclination towards the left of the island, trucks have Modify island and alignment at Hudson Road to form a 90 degree angle
been noted to crossover the island when turning from Route 85
Landscaping within island at Route 85 and to the east of Route 85 obscure Trim landscaping within Route 85 island and east of Hudson Road and view of Route 117 from turning vehicles
relocate utility pole
Motorist Guidance/Signage
Pavement Markings
Maintenance, Drainage and Ponding Issues
Cost
Responsibility
Define curbing and pavement edge for western corner at Route 85
Mid
Mid‐Term
Low
Town of Bolton
When queues form vehicles wait within the breakdown lane of I‐495
Install warning signs for expected queues at I‐495 northbound ramps
High
Short‐Term
Low
MassDOT
Queues during the evening peak hour can extend to Stow, signal timing does coordination should be verified for RT117/I‐495 SB/Sugar Rd and RT 117/I‐
High
not seem coordinated
495 NB
Short‐Term
Low
MassDOT
Provide painted gore with hash lines and warning signage such as “KEEP RIGHT” to notify vehicles on RT 85 of approaching island
coordination should be verified for RT117/I‐495 SB/Sugar Rd and RT 117/I‐
Low
495 NB
Short‐Term
Low
Town of Bolton
There is no protected phase for eastbound movement at RT 117/I‐495 SB/Sugar Rd with inadequade gaps for eastbound left turn movements
There is a wate of green time motorists that have already completed their turns
Evaluate existing equipment at RT 117/I‐495 SB/Sugar Rd and provide a protected phase and optimize timing
Mid
Mid‐Term
Mid
MassDOT
Verify operating conditions of detection equipment
Mid
Short‐Term
Low
MassDOT
Determine efficiency of one lane for Route 117 and Route 85
Mid
Short‐Term
Low
MassDOT
Many vehicles use Route 85 and Route 117 in the project area as a shortcut Determine signage along Route 2 needed for alternative routes for Route Low
117 and Route 85
between towns
Short‐Term
Low
MassDOT/ Town of Bolton
Short‐Term
Low
MassDOT/ Town of Bolton
Possibly future development within the proximity of I‐495 NB Ramps
Work with Developer of property to incorporate improvements to accommodate new traffic and geometry of site
Many signs are illegible within the project area
Collision diagram showing rear‐end type along legs of intersection or angle type between approaches at RT 117/RT 85
Low
Remove and replace indistinguishable signs where necessary
Install intersection ahead sign (W2‐2) and Hudson Road street name sign Low
(D3 1) to inform motorists of approaching intersection
(D3‐1)
Currently there is one yield sign located on the left side for I‐495 SB off‐ramp
Install additional yield sign on I‐495 SB off‐ramp and adjust existing sign if Low
necessary
Low
Short‐Term
Low
Town of Bolton
Short‐Term
Low
Town of Bolton
Short‐Term
Low
MassDOT
Currently the I‐495 NB guide sign for eastbound movement at RT 117/I‐495 Relocate I‐495 guide sign for eastbound traffic
NB is blocked by the new signal
Low
Short‐Term
Low
MassDOT
Some vehicles currently use the I‐495 left turn lane for right turns
Install LEFT TURN MUST TURN LEFT sign (R3‐7) for I‐495 NB off‐ramp
Mid
Short‐Term
Low
MassDOT
Trucks have and other vehicles use side of the road to park for the convenience store and cemetery
Install No Parking sign west of Route 85 on south side of Route 117
Low
Short‐Term
Low
Town of Bolton
When queues form vehicles wait within the breakdown lane of I‐495
Install warning signs for expected queues at I‐495 northbound ramps
High
Short‐Term
Low
MassDOT
Short‐Term
Low
MassDOT
Short‐Term
Low
MassDOT
Short‐Term
Short‐Term
Low
Property Owner/ Town of Bolton
Westbound through movement vehicles use the single lane to move around Extend westbound left turn lane at RT 117/I‐495 SB/Sugar Rd
Mid
queue formed from stopped left turn lane
Modify pavement markings to accommodate wider shoulder for bicycle There currently is no defined path for bicycles within the project area
Mid
lanes
Trucks have been noted to crossover island at plaza southeast of I‐495, there Install pavement markings at entrance/exit of plaza southeast of I‐495 NB Low
currently are no pavement markings at the plaza entrance/exit
ramps, and/or modify island
Some vehicles currently use the I‐495 left turn lane for right turns
Install left turn arrow and ONLY legend in the left turn lane of the I‐495 NB off ramp Mid
Short‐Term
Low
MassDOT
There are unpaved area where rutting and ponding occur
patch existing potholes in roadway
Mid
Mid‐Term
Low
MassDOT/ Town of Bolton
There are unpaved area where rutting and ponding occur to the west of Route 85. The edge of roadway is undefined.
modify pavement west of Route 85 to better define pavement edge that Mid
can accommodate truck movements
Mid‐Term
Low
Town of Bolton
Long‐Term
Mid
Town of Bolton
Short‐Term
Low
Town of Bolton
Long‐Term
High
MassDOT
Long‐Term
Mid
MassDOT/ Town of Bolton
Long‐Term
Low
MassDOT
Sh
Short‐Term
Low
O
MassDOT
Trucks have and other vehicles use side of the road to park for the convenience store and cemetery
Ponding is apparent within the project area
Bike and Pedestrian Accomodations
Time Frame
There are unpaved area where rutting and ponding occur to the west of Route 85. The edge of roadway is undefined.
There exists heavy queues in the peak hours
Road and Ramp Capacity
Safety Payoff
provide curbing along edge of Route 117 near Route 85 and wherever Mid
necessary to deter trucks from parking
Low
Cleaning and Maintaining drainage structures
Install sidewalks and handicap ramps along south side of Route 117 Mid
within project area
Install pedestrian phases at RT 117/I‐495 SB/Sugar Road and wherever There are currently no accomodations for pedestrians within the project area
Mid
appropriate
Install crosswalks at the intersection of RT 117/I‐495 SB/Sugar Rd, RT 117/ Low
RT 85 and convenience store to cemetery
Restripe roadway to provide better bicycle accomodation along Route h currently
l iis no d
fi d path
h ffor bi
l within
i hi the
h project
j area
id
There
defined
bicycles
Mid
117
APPENDIX
Appendix A – RSA Meeting Agenda
Appendix B- Detailed Crash Data
Appendix C- Traffic Volume Data
Appendix D- Existing Conditions Plan
Road Safety Audit- I-495/Route 117 Interchange, Bolton, MA
Prepared by Green International Affiliates, Inc.
16
AppendixA–RSAMeetingAgenda
Road Safety Audit at I-495/Route 117 Interchange, Bolton, MA
Appendix
Road Safety Audit
Meeting Location: Bolton
Public Safety Training Room
May 29, 2013
10:00 AM – 12:00 noon
Type of meeting:
I-495/Route 117 Interchange – Road Safety Audit
Attendees:
Invited Participants to Comprise a Multidisciplinary Team
Please bring:
Thoughts and Enthusiasm!!
10:00 AM
Welcome and Introductions
10:15 AM
Review of Site Specific Material (enclosed)
• Crash, Speed & Volume Summaries– provided in advance
• Existing Geometries and Conditions
11:00 AM
Visit the Site
• Drive to LOCATION
• As a group, review site & identify areas for improvement
11:30 AM
Post Visit Discussion / Completion of RSA
• Discuss observations and finalize findings
• Discuss potential improvements and finalize recommendations
12:00 noon
Adjourn for the Day – but the RSA has not ended
Instructions for Participants:
• Before attending the RSA on DATE, participants are encouraged to drive through
the project area and complete/consider elements on the RSA Prompt List
(enclosed) with a focus on safety.
• All participants will be actively involved in the process throughout. Participants
are encouraged to come with thoughts and ideas, but are reminded that the
synergy that develops and respect for others’ opinions are key elements to the
success of the overall RSA process.
• After the RSA meeting, participants will be asked to comment and respond to the
document materials to assure it is reflective of the RSA completed by the
multidisciplinary team.
I-495/Route 117 Interchange Improvement Study
AppendixB‐DetailedCrashData
Road Safety Audit at I-495/Route 117 Interchange, Bolton, MA
Appendix
ROUTE 117 (MAlN STREET)
05/30/09, 3 P, SA, C 8c 0
NOT TO SCALE
LEGEND
D.'.'TE, Tlt.IE, D.'.Y, WE'ATHER a: PAVEr.IENT CONDITION
PATH OF MOVING MOTOR VEHICLE
PEDESTRIAN PATH
FATAL
NON FATAL
0
REAR-END OOUJ~ON
NIGLE COUJSION
e
WE'ATHER
C -
CLEAR
F = FOG
R - RAIN
SL- SLEET
S =SNOW
CL - CLOUDY
~
FIGURE 2.15
INTERSECTION COLLISION DIAGRAM
BICYCLE
MOTORCYCLE
PARKED VEHICLE
FIXED OBJECT
OUT OF CONTROL
SIDE SWIPE
WEEKD.'.Y
PAVEMENT
D- DRY
W- WET
I - ICY
S -
SLUSHY
2009-2011
ROUTE 117 {MAIN STREET), AND
1-495 SB RAMPS/SUGAR ROAD
M -
MOND.'.Y
TU
= TUESDAY
BOLTON, MA
W = WEDNESD.'.Y TH - THURSDAY
F -
FRID.'.Y
SU
SA -
= SUND.'.Y
SATURDAY
r=l GREEN INTERNATIONAL AFFILIATES, INC.
I:JI
COIIU.fllll -
WESTFOID, IIAIIIICIIUIET1S
rn
a..
~
<
0::
OJ
z
I()
(J)
"''t
I
ROUT£ 117
(MAIN
NOT TO SCALE
LEGEND
D.'.'TE. Tlt.IE, D.'.Y. WE'ATHER a: PAVEr.IENT CONDITION
PATH OF MOVING MOTOR VEHICLE
PEDESTRIAN PATH
FATAL
NON FATAL
0
REAR-END OOUJ~ON
NIGLE COUJSION
e
WE'ATHER
C -
CLEAR
F = FOG
R - RAIN
SL- SLEET
S =SNOW
Cl. - CLOUDY
~
PAVEWENT
D- DRY
W- WET
I - ICY
S -
SLUSHY
FIGURE 2.16
INTERSECTION COLLISION DIAGRAM
BICYCLE
MOTORCYCLE
PARKED VEHICLE
FIXED OBJECT
OUT OF CONTROL
SIDE SWIPE
2009-2011
ROUTE 117 {MAIN STREET), AND
1-495 NB RAMPS
WEEKD.'.Y
M - WOND.'.Y
TU = TUESDAY
W = WEDNESD.'.Y TH - THURSDAY
F - FRID.'.Y
SA - SATURDAY
SU = SUND.'.Y
BOLTON, MA
GREEN INTERNATIONAL AFFILIATES, INC.
COIIU..fllll -
WESTFOID, IIAIIIICIIUIET1S
ROUTE 117 (MAIN STREET)
0 ..
I..
09/12/09, 12 P, SA, R &
w
07/20/09, 2 P, M, CL & D
09/28/10, 6 A, TU, R & W
..-1 .,.
03 17 10, 6 A W C & I
NOT TO SCALE
LEGEND
DATE. liME. DIIY. WEATliER .t PAVEioiENT CONDmON
PATH OF MOVING MOTOR VEHICLE
PEDESTRIAN PATli
FATAL
e
NON FATAL
0
REAR-END ca.LISIDN
ANGLE COWSION
WEATHER
=
C
CLEAR
F-FOG
R - RAIN
SL - SLEET
S=SNOW
CL - CLOUDY
~
FIGURE 2.17
INTERSECTION COLLISION DIAGRAM
BICYCLE
lolaroRCI'CLE
PARKED VEHICLE
FIXED OBJECT
OUT OF CONTROL
SIDE SWIPE
WEEKDAY
PAVEMENT
D- DRY
W- WET
I= ICY
S -
SWSH'I'
2009-2011
ROUTE 117 (MAIN STREET), AND
ROUTE 85 (HUDSON ROAD)
=
t.t
MONDAY
TU - TUESDIIY
W - WEDNESDAY Tli - TliURSDAY
F - FRIDAY
SA - SATURDIIY
SU
SUNDAY
=
BOLTON, MA
-·-..all
r=l GREEN INTERNATIONAL AFfiUATES, INC.
1:11 CONIUUINI­
!7
• COUJSION OCCURRED OVER <400' OF ROUTE 117 (t.IAIN smEET)
AT SUGAR ROA0/1-4-95 SB RAMP INTERSEcnON
NOT TO SCALE
LEGENO
DATE. lli.IE. DIIY. WEATliER .t PAVEI.IENT CONDmON
PATH OF !.lOVING I.IOTOR VEHICLE
PEDESTRIAN PATli
FATAL
e
NON FATAL
0
REAR-END COLLISION
ANGLE COWSION
WEATHER
C
= CLEAR
F'-FOG
R - RAIN
SL - SLEET
S=SNOW
CL - CLOUDY
~
FIGURE 2.18 ROADWAY SEGMENT COLLISION DIAGRAM BICYCLE
I.IOTORCI'CLE
PARKED VEHICLE
FIXED OBJECT
OUT OF CONTROL
SIDE SWIPE
WEEI<DAY
PAVEI.IENT
D- DRY
W- WET
I= ICY
S - SWSHY
t.l = MONDAY
TU - TUESDIIY
W - WEDNESDAY Tli - TliURSDAY
F' - FRIDAY
SA - SATURDIIY
SU
= SUNDAY
2009-2011
ROUTE 117 (MAIN ST), 1-495 RAMPS
SUGAR RD, & ROUTE 85 (HUDSON RD)
BOLTON, MA
-·-..all
r=l GREEN INTERNATIONAL AFfiUATES, INC.
1:11 CONIUUINI­
NOT TO SCALE
LEGEND
DATE. lli.IE. DIIY. WEATliER .t PAVEI.IENT CONDmON
PATH OF !.lOVING I.IOTOR 1/EHICL.E
PEDESTRIAN PATli
FATAL
e
NON FATAL
0
REAR-END COLLISION
ANGLE COWSION
WEATHER
C
= CLEAR
F'-FOG
R - RAIN
SL - SLEET
S=SNOW
CL - CLOUDY
~
FIGURE 2.19 ROADWAY SEGMENT COLLISION DIAGRAM BICYCLE
I.IOTORCI'CL.E
PARKED 1/EHICL.E
FIXED OBJECT
OUT OF CONTROL
SIDE SWIPE
WEEI<DAY
PAVEI.IENT
D- DRY
W- WET
I= ICY
S -
SWSHY
=
t.l
MONDAY
TU - TUESDIIY
W - WEDNESDAY Tli - TliURSDAY
F' - FRIDAY
SA - SATURDIIY
SU
SUNDAY
=
2009-2011
ROUTE 117 (MAIN ST), 1-495 RAMPS
SUGAR RD, & ROUTE 85 (HUDSON RD)
BOLTON, MA
-·-..all
r=l GREEN INTERNATIONAL AFfiUATES, INC.
1:11 CONIUUINI­
TRAFFIC ACCIDENT SUMMARY – OVERALL
2009-2011
Route 117 (Main Street), I-495 Ramps, Sugar Road, and Route 85 (Hudson Road) Bolton, MA
2009
Type
PI
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
PD
1
2
Total
3
F
T
2010
PD
F
PI
T
1
1
9
2
2
1
1
9*
2*
2
1
1
1
1
1
1*
1
17
1
17
2
3
14
3
14
Sep
1
1
7
2
8
2011
PD
F
PI
2
8*
T
4
4
14
14*
1
1
1
3
22
3
22
Oct
2
2
1
Nov
1
1
3
Dec
3
1
1
Total
17
14
22
10
1
11
Total
5
12
5
9
7
15
1
PI: Personal Injury PD: Property Damage
F: Fatality T: Total
*One accident caused both personal injury and property damage
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
1
1
1
Feb
1
1
1
Mar
Apr
May
1
2
1
1
1
Jun
3
Jul
3
1
1
3
Aug
1
3
2
DAY OF THE WEEK
2010
2011
Sun
3
2
1
Mon
2
1
2
1
2
3
4
5
6
2
2
2
2
2
1
1
1
2
2
1
3
3
Tue
3
6
4
Wed
2
3
2
Thu
2
2
5
Fri
2
Sat
3
1
3
4
Total
17
14
22
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
2
1
2
3
3
7
1
1
1
3
8
1
1
1
3
2
9
1
1
1
TRAFFIC ACCIDENT SUMMARY
2009-2011
Route 117 (Main Street) West of I-495 SB Ramps/Sugar Road Segment
Bolton, MA
2009
Type
PI
PD
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
Total
F
T
2010
PD
F
PI
T
2011
PD
F
PI
T
1
1
1
1
2
2
1
1
1
1
2
2
2
4
2
4
PI: Personal Injury PD: Property Damage
F: Fatality T: Total
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
1
Sep
Oct
Nov
Dec
1
Total
1
2
4
11
Total
1
1
1
1
2
DAY OF THE WEEK
2010
2011
Sun
1
2
Mon
Tue
1
1
1
Wed
Thu
1
1
Fri
Sat
2
Total
1
2
4
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
1
3
4
5
6
7
1
8
1
1
2
1
9
10
2
4
TRAFFIC ACCIDENT SUMMARY
2009-2011
Route 117 (Main Street), and I-495 SB Ramps/Sugar Road Bolton, MA
2009
Type
PI
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
PD
1
Total
1
F
T
PI
1
1
1
2
1
2
1*
1
1
1
5
6
2010
PD
F
1
T
1
1*
1
1
1
2011
PD
F
PI
1
T
2
2
1
1*
1
1
4
2
1
4
Sep
Oct
Nov
PI: Personal Injury PD: Property Damage
F: Fatality T: Total
*One accident caused both personal injury and property damage
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
Feb
1
Mar
Apr
May
1
1
Jun
2
Jul
Aug
1
1
1
1
1
Dec
1
1
Total
6
2
4
DAY OF THE WEEK
2010
2011
Sun
2
Mon
1
2
3
1
1
Tue
1
Wed
Thu
1
1
2
1
Fri
1
Sat
2
1
Total
6
2
4
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
1
4
5
6
7
1
8
9
1
10
11
1
1
1
1
1
1
1
Total
1
5
1
1
1
3
TRAFFIC ACCIDENT SUMMARY
2009-2011
Route 117 (Main Street) Segment Between I-495 SB Ramps/Sugar Road and I-495 NB Ramps
Bolton, MA
2009
Type
PI
PD
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
Total
F
T
2010
PD
F
PI
T
2011
PD
F
PI
T
3
3
4
4
3
3
4
4
PI: Personal Injury PD: Property Damage
F: Fatality T: Total
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
Feb
Mar
Apr
May
Jun
1
Jul
Aug
Sep
Oct
1
Nov
1
Dec
4
Total
3
4
DAY OF THE WEEK
2010
2011
Sun
1
2
Mon
Tue
1
1
2
Wed
1
Thu
Fri
1
Sat
Total
3
1
4
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
3
4
5
1
1
1
2
6
7
8
9
10
11
Total
3
2
4
TRAFFIC ACCIDENT SUMMARY
2009-2011
Route 117 (Main Street), and I-495 NB Ramps
Bolton, MA
2009
Type
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
Total
PI
PD
1
1
F
2010
PD
F
T
2011
PD
F
T
PI
PI
T
1
1
1
1
1*
1
1
4
4*
7
7
1
4
1
4
1
4
4
7
7
PI: Personal Injury PD: Property Damage
F: Fatality T: Total
*One accident caused both personal injury and property damage
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
1
1
Feb
Mar
Apr
May
Jun
1
1
1
Jul
2
1
1
Aug
Sep
1
1
1
Oct
Nov
Dec
1
Total
4
4
7
11
Total
2
2
1
1
DAY OF THE WEEK
2010
2011
Sun
1
1
1
2
1
Mon
1
1
Tue
1
2
1
Wed
1
Thu
Fri
1
1
3
Sat
1
Total
4
4
7
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
3
4
5
1
1
6
7
1
2
1
1
1
1
1
3
8
9
10
1
4
1
6
TRAFFIC ACCIDENT SUMMARY
2009-2011
Route 117 (Main Street) Segment Between I-495 NB Ramps and Route 85 (Hudson Road) Bolton, MA
2009
Type
PI
PD
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
Total
F
T
1
1
1
1
PI: Personal Injury PD: Property Damage
2010
PD
F
PI
T
1
1
1
1
2011
PD
F
PI
T
1
1
1
1
F: Fatality T: Total
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
1
Nov
Dec
Total
1
1
1
10
11
Total
1
1
1
DAY OF THE WEEK
2010
2011
Sun
1
2
Mon
Tue
Wed
Thu
1
Fri
Sat
1
1
Total
1
1
1
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
3
4
5
6
7
8
1
9
1
1
1
1
TRAFFIC ACCIDENT SUMMARY
2009-2011
Route 117 (Main Street), and Route 85 (Hudson Road) Bolton, MA
2009
Type
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
Total
F
T
2010
PD
F
PI
T
2011
PD
F
PI
PD
PI
T
1
1
1
1
1*
1
1
1
1
1
1
1
2
2
2
4
2
4
1
2
1
2
PI: Personal Injury PD: Property Damage
F: Fatality T: Total
*One accident caused both personal injury and property damage
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
Feb
Mar
Apr
May
Jun
Jul
1
Aug
Sep
1
1
1
Oct
1
Nov
Dec
1
1
1
Total
2
4
2
DAY OF THE WEEK
2010
2011
Sun
1
2
Mon
1
1
Tue
Wed
2
1
1
Thu
Fri
Sat
1
1
Total
2
4
2
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
1
3
4
5
6
1
2
1
1
1
7
8
9
10
11
Total
2
2
2
1
2
TRAFFIC ACCIDENT SUMMARY
2009-2011
Route 85 (Hudson Road) Segment
Bolton, MA
2009
Type
PI
PD
F
T
2010
PD
F
PI
Angle
Right Angle
Rear - end
Head -on
Side Swipe: Opp. Dir.
Same dir.
Turning Left
Turning Right
Fixed Object
Pedestrians/Bicycle
Other
T
1
1
Total
PI: Personal Injury PD: Property Damage
2011
PD
F
PI
T
1
1
F: Fatality T: Total
MONTH OF THE YEAR
Year
2009
2010
2011
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1
Total
1
DAY OF THE WEEK
2010
2011
Sun
1
2
Mon
Tue
Wed
Thu
Fri
Sat
Total
1
1
TIME OF DAY
Year
2009
Year
2009
2010
2011
12
AM
PM
AM
PM
AM
PM
3
4
5
6
7
8
1
9
10
11
Total
1