TC - Item 3B - Line of Sight Traffic Review at 8834 Garvey Avenue 111MF
9 ° ROSEMEAD TRAFFIC COMMISSION
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NC.....4ORATED 9C STAFF REPORT
TO: TRAFFIC COMMISSION
FROM: DIRECTOR OF PUBLIC WORKS
DATE: JUNE 3, 2021
SUBJECT: LINE OF SIGHT TRAFFIC REVIEW AT 8834 GARVEY AVENUE
SUMMARY
The City of Rosemead received a request to review and evaluate the line of sight when exiting the
driveway entrance/exit of the mobile homes located at 8834 Garvey Avenue. The resident reported
that there is limited sight visibility for vehicles attempting to exit due to vehicles parking too close
to the driveway.Currently vehicles appears to be parking right up to the driveway approach making
it difficult to see oncoming traffic and maneuver in and out of the driveway.
On behalf of the City of Rosemead, engineering staff has completed a traffic analysis to evaluate
the line of sight when exiting the mobile home neighborhood's driveway. The traffic review
included an analysis of the existing roadway conditions,a line of sight analysis and an examination
of 5.5 years of available collision data and recommended appropriate recommendations in
response to this request.
ANALYSIS
The traffic review included an analysis of the existing roadway conditions, a line of sight analysis
and an examination of 5.5 years of available collision data. The placement of all traffic control
devices and measures are dictated by engineering judgment and based on guidelines found in the
CAMUTCD (California Manual on Uniform Traffic Control Devices) and the CVC (California
Vehicle Code). The installation of all official traffic control devices and measures is also based on
an engineering review with justification.
Existing Roadway Conditions:
Garvey Avenue is an east/west major arterial roadway and is approximately 75-feet wide, with
two lanes in each direction. The roadway has a raised center median separating opposing traffic
along Garvey Avenue.Additionally,there is a yellow striped center left turn lane directly opposite
the driveway at 8834 Garvey Avenue for vehicles to wait in while attempting a left turn into
driveway. Parking is allowed along both sides of Garvey Avenue except from Tuesday to Friday
between the times of 2:00am— 6am. In addition, both sides of Garvey Avenue have restricted 2-
hour parking from 7:00am — 6pm, except on Sundays. There is approximately 60' of available
Rosemead Traffic Commission Meeting
June 3,2021
Page 2 of 3
parking to the west of the driveway. Garvey Avenue has a speed limit of 35 mph.Land use through
this segment of Garvey Avenue is a mix of Light Industrial, Medium Commercial, and Single
Family Residential.
Line of Sight at Driveways:
The driver of a vehicle approaching or departing from a driveway should have an unobstructed
view of approaching traffic, the intersection, including any traffic control devices, and sufficient
lengths along the intersecting highway to permit the driver to anticipate and avoid potential
collisions(Maze and Plazak 2000).These unobstructed views form triangular areas known as sight
triangles. Any object within the sight triangle that would obstruct the driver's view of an
approaching vehicle should be removed or modified or appropriate traffic control devices should
be installed as per the Manual on Uniform Traffic Control Devices. Obstructions within sight
triangles could be buildings, vehicles, hedges, trees, bushes, tall crops, walls, fences or parked
cars. A parked vehicle extends approximately 7-feet from the curb, so it's necessary to consider
the width of a vehicle when determining the amount of red curb needed to obtain a clear sight
triangle.
Per A Policy on Geometric Design of Highways and Streets (AASHTO) Table 3-1 for Stopping
Sight Distances, for a roadway with a posted speed of 35 mph the clear sight distance needed is
250 feet. Based on design speeds and a line of sight analysis was conducted to show the calculated
amount of clear sight that is needed for vehicles exiting from the mobile home neighborhood
driveway located at 8834 Garvey Avenue onto Garvey Avenue.
Collision data was obtained from the computerized collision records system maintained by the
State of California called the Statewide Integrated Traffic Records Systems (SWITRS). A review
and analysis of all collisions that occurred within 100-feet of the mobile home neighborhood's
driveway along Garvey Avenue was conducted over a 5.5-year period between January 2016 to
the most recent available collision data, April 2021. There was a total of 4 collisions reported. Per
the review of the collision history, there were 4 collisions reported within 100-feet of the mobile
home neighborhood's driveway along Garvey Avenue within the 5.5-year period. Of the 4
collisions,2 collisions were broadside, 1 involved Auto R-O-W,and 1 involved a vehicle colliding
with a parked vehicle. It appeared that most were a result of vehicles making a left turn out from
the driveway to enter into the stream of traffic. Several other collisions were reported near and
around the driveway but only the collisions thought to be directly related to the driveway of
concern were analyzed.
STAFF RECOMMENDATION
After a thorough review of existing conditions, it is recommended that 24' of curb directly to the
west of the mobile home neighborhood's driveway located at 8834 Garvey Avenue be painted red
to provide a better line of sight for vehicles exiting the driveway. The placement of all traffic
control devices is dictated by engineering judgment and based on guidelines found in the
CAMUTCD (California Manual on Uniform Traffic Control Devices) and the CVC (California
Vehicle Code).The installation of all official traffic control devices is also based on an engineering
review with justification
Rosemead Traffic Commission Meeting
June 3,2021
Page 3 of 3
A detailed traffic report and proposed figure diagram is attached as Attachment A to this staff
report, please refer to Figure 5 of Attachment A for the proposed recommendations diagram.
Below is a detailed list of the recommendations:
1. Install approximately 24-feet of red curb along the southside of Garvey Avenue,just west
of the mobile home neighborhood's driveway located at 8834 Garvey Avenue, per
CAMUTCD Section 3B.19.
a. The installation of red curb to the west of the driveway will improve the line of
sight from vehicles exiting the driveway. This will remove approximately 1
parking space and will leave 36-feet of available curb space for vehicles to park
along the southside of Garvey Avenue,just west of the mobile home
neighborhood's driveway.
Prepared by:
Jana Robbins, Contract Traffic Engineering Division
Attachments:
A. Technical Engineering Report
B. Courtesy Notice
A#achw,w,+ A
TRANSTECh
TO: Rosemead Department of Public Works
FROM: Traffic Engineering(Transtech)
DATE: May 21, 2021
SUBJECT: LINE OF SIGHT TRAFFIC REVIEW AT THE 8834 GARVEY AVENUE DRIVEWAY
INTRODUCTION/BACKGROUND
The City of Rosemead received a request to review and evaluate the line of sight when exiting the
driveway entrance/exit of the mobile home neighborhood located at 8834 Garvey Avenue. The resident
reported that there is limited sight visibility for vehicles attempting to exit due to vehicles parking too
close to the driveway. Currently vehicles appears to be parking right up to the driveway approach making
it difficult to see oncoming traffic and maneuver in and out of the driveway. The placement of all traffic
control devices is dictated by engineering judgment and based on guidelines found in the CAMUTCD
(California Manual on Uniform Traffic Control Devices) and the CVC(California Vehicle Code). On behalf
of the City of Rosemead, engineering staff has completed a traffic analysis to evaluate the line of sight
when exiting the mobile home neighborhood's driveway. The traffic review included an analysis of the
existing roadway conditions, a line of sight analysis and an examination of 5.5 years of available collision
data. Please refer to Figure 1 below for a vicinity map of the subject location.
Figure 1:Vicinity Map
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LEGEND ,--- ,, Location of Interest:
A ys f Mobile home neighborhood's driveway at 8834 Garvey Avenue
CITY OF ROSEMEAD
0 E AD Prepared By:Transtech Engineers,Inc. I Page 1 of 7
LINE OF SIGHT TRAFFIC REVIEW AT THE 8834 GARVEY AVENUE DRIVEWAY
Figure 2:Existing Conditions Map
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LEGEND
.•, Location of Interest:mobile I1 No U-Turn(Symbol)Sign >< Existing Driveway
`:= % home neighborhood's driveway f,J (R3-4)Double-sided /\
at 8834 Garvey Avenue
STOP, STOP Sign(R1-1) Existing Curb Space for
DSignalized Intersection at Parking
mi
Muscatel Ave and Garvey Ave NOT A THROUGH STREET Sign Existing Red Curb
.6. Fire Hydrant (Non-MUTCD Compliant)
EXISTING CONDITIONS
Garvey Avenue:Garvey Avenue is an east/west major arterial roadway and is approximately 75-feet wide,
with two lanes in each direction. The roadway has a raised center median separating opposing traffic
along Garvey Avenue. Additionally, there is a yellow striped center left turn lane directly opposite the
driveway at 8834 Garvey Avenue for vehicles to wait in while attempting a left turn into driveway. Parking
is allowed along both sides of Garvey Avenue except from Tuesday to Friday between the times of 2:00am
—6am.In addition,both sides of Garvey Avenue have restricted 2-hour parking from 7:00am—6pm,except
on Sundays.There is approximately 60' of available parking to the west of the driveway. Garvey Avenue
has a speed limit of 35 mph. Land use through this segment of Garvey Avenue is a mix of Light Industrial,
Medium Commercial, and Single Family Residential.
CITY OF ROSEMEAD
0 E AD Prepared By:Transtech Engineers,Inc. I Page 2 of 7
LINE OF SIGHT TRAFFIC REVIEW AT THE 8834 GARVEY AVENUE DRIVEWAY
PICTURE SUMMARY: EXISTING CONDITIONS
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South view at Ivar Ave toward the mobile home neighborhood's Driveway of Concern
r'T CITY OF ROSEMEAD
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1°0 E" 'AD Prepared By:Transtech Engineers,Inc. I Page 3 of 7
LINE OF SIGHT TRAFFIC REVIEW AT THE 8834 GARVEY AVENUE DRIVEWAY
LINE OF SIGHT AT DRIVEWAYS
The driver of a vehicle approaching or departing from a driveway should have an unobstructed view of
approaching traffic,the intersection,including any traffic control devices,and sufficient lengths along the
intersecting highway to permit the driver to anticipate and avoid potential collisions (Maze and Plazak
2000). These unobstructed views form triangular areas known as sight triangles. Any object within the
sight triangle that would obstruct the driver's view of an approaching vehicle should be removed or
modified or appropriate traffic control devices should be installed as per the Manual on Uniform Traffic
Control Devices.Obstructions within sight triangles could be buildings,vehicles,hedges,trees,bushes,tall
crops, walls, fences or parked cars. A parked vehicle extends approximately 7-feet from the curb, so it's
necessary to consider the width of a vehicle when determining the amount of red curb needed to obtain
a clear sight triangle.
Per A Policy on Geometric Design of Highways and Streets (AASHTO) Table 3-1, for a roadway with a
posted speed of 35 mph the clear sight distance needed is 250 feet. Table 1 below summarizes the
Stopping Sight Distance based on design speeds and Figure 3 below shows the calculated amount of clear
sight that is needed for vehicles exiting from the mobile home neighborhood's driveway located at 8834
Garvey Avenue onto Garvey Avenue.
Table 1:Stopping Sight Distance
Design Brake reaction Braking distance on Stopping Sight Distance
Speed distance level Calculated Design
(MPH) (ft) (ft) (ft) (ft)
15 55.1 21.6 76.7 80
20 73.5 38.4 111.9 115
25 91.9 60.0 151.9 155
30 110.3 86.4 196.7 200
35 128.6 117.6 246.2 250
40 147.0 153.6 300.6 305
45 165.4 194.4 359.8 360
50 183.8 240.0 423.8 425
55 202.1 290.3 492.4 495
60 220.5 345.5 566.0 570
65 238.9 405.5 644.4 645
Note:Brake reaction distance predicated on a time of 2.5s;deceleration rate 11.2 ft/sect
CITY OF ROSEMEAD
OSE A Prepared By:Transtech Engineers,Inc. I Page 4 of 7
LINE OF SIGHT TRAFFIC REVIEW AT THE 8834 GARVEY AVENUE DRIVEWAY
Figure 3. Line of Sight Analysis Exiting from the Mobile Home Neighborhood's Driveway at 8834 Garvey
Avenue
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F ► 24-feet •of curb to • 55-feet of curb to be clear of obstructions.20-.^
• 1mit ................... �I a be clear of r feet of existing red curb and the existing f'C
_ ititort —�'. 1 obstructions 1,- driveway provide the necessary line of sight
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COLLISION INVESTIGATION
Collision data was obtained from the computerized collision records system maintained by the State of
California called the Statewide Integrated Traffic Records Systems (SWITRS). A review and analysis of all
collisions that occurred within 100-feet of the mobile home neighborhood's driveway along Garvey
Avenue was conducted over a 5.5-year period between January 2016 to the most recent available collision
data,April 2021.There was a total of 4 collisions reported.A summary breakdown by year of the number
of collisions at the studied intersection is shown below in Table 2, while Figure 3 shows the Collision
Diagram.
2021: 0 collisions 2018: 1 collision
2020: 1 collision 2017: 1 collision
2019: 0 collisions 2016: 1 collision
Table 2 provides a detailed list of the collisions within 100-feet of mobile home neighborhood's driveway
along Garvey Avenue.
Table 2: Collision History within 100-feet of mobile home neighborhood's driveway along Garvey
Avenue
opAD
CITY OF ROSEMEAD
Prepared By:Transtech Engineers,Inc. I Page 5 of 7
LINE OF SIGHT TRAFFIC REVIEW AT THE 8834 GARVEY AVENUE DRIVEWAY
Severity I
1-Fetal
2-Severe Injury Motor
Time Day of 3.Other Visible Prlmery Vehicle'
Primary Cotillion Type Collison Factor and
IDB Date Road Secondary Rota Ma (24 the Lighting Weather Injury a
In) 00111510n Deo 0.0ptione Pedeetden, Other Info
Hour) Week 4-Complaint of Factor Blcyd.
Pain Involved
3-Prop Dam Only
MOO)
R-O-W SB THRU VEH HIT VEH 2
1 1/25/2020 GARVEY NAR AV 23'W 11:11 SAT DAY CLOUDY R-O-W AUTO 3 1 OTHER MV DRVR
AUTO WB THRU VEH
EB
MINOR
VEH VEH1
2 6/8/2016 GARVEY AV IVAR AV 77'W 11:30 FRI DAY CLEAR BROADSIDE 3 1 UNKNOWN NBENTTOTHERRFVEHHIT OTHER MV DRVR
POSSUM.
3 10/27/2017 GARVEY AV IVAR AV 0' 100 FRI DAY CLEAR OTHER 5 0 IMPROP UNS TURN VEH HIT PKD MV NA
TURN WB PARKED VEH
0 2/17/2016 GARVEY AV IVAR AV 0' 1800 WED DUSK/DA RAINING BROADSIDE 5 0 R-O-W SB RGT TURN VEH OTHER MV NA
WN AUTO HIT WB THRU VEH
Per the review of the collision history,there were 4 collisions reported within 100-feet of the mobile home
neighborhood's driveway along Garvey Avenue within the 5.5-year period. Of the 4 collisions, 2 collisions
were broadside, 1 involved Auto R-O-W, and 1 involved a vehicle colliding with a parked vehicle. It
appeared that most were a result of vehicles making a left turn out from the driveway to enter into the
stream of traffic. Several other collisions were reported near and around the driveway but only the
collisions thought to be directly related to the driveway of concern are listed above in Table 1. Figure 4
below displays the listed collisions at their approximate locations where each collision occurred along
Garvey Avenue.
Figure 4:Collision Diagram
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I�L ! s.k. i____170, CRASHES
RECOMMENDATIONS
CITY OF ROSEMEAD
0 E AD Prepared By:Transtech Engineers,Inc. I Page 6 of 7
LINE OF SIGHT TRAFFIC REVIEW AT THE 8834 GARVEY AVENUE DRIVEWAY
The placement of all traffic control devices is dictated by engineering judgment and based on guidelines
found in the CAMUTCD (California Manual on Uniform Traffic Control Devices) and the CVC (California
Vehicle Code).The installation of all official traffic control devices is also based on an engineering review
with justification. After a thorough review of existing conditions, it is recommended that 24' of curb
directly to the west of the mobile home neighborhood's driveway located at 8834 Garvey Avenue be
painted red to provide a better line of sight for vehicles exiting the driveway. Please refer to the below
recommendations and to Figure 5 for the proposed recommendations.
Below is a detailed list of the recommendations:
1. Install approximately 24-feet of red curb along the southside of Garvey Avenue,just west of the
mobile home neighborhood's driveway located at 8834 Garvey Avenue, per CAMUTCD Section
36.19.
• The installation of red curb to the west of the driveway will improve the line of sight from
vehicles exiting the driveway. This will remove approximately 1 parking space and will leave
36-feet of available curb space for vehicles to park along the southside of Garvey Avenue,just
west of the mobile home neighborhood's driveway.
Figure 5: Proposed Recommendations
}It,14101P.
Reference:CVC Section 22500;CAMUTCD Section 38.19.
CITY OF ROSEMEAD
osk,
Prepared By:Transtech Engineers,Inc. I Page 7 of 7
Attachment B
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Traffic Commission Courtesy Notification
NOTICE IS HEREBY GIVEN that on Thursday,June 3,2021,at the hour of 7:00 p.m.,or soon thereafter as the matter may be heard,the
Rosemead Traffic Commission will hold a public meeting in the Council Chambers at City Hall for the purpose of reviewing the line of
sight at 8834 Garvey Avenue.
You are being notified of this meeting because your property is within proximity to the location. We encourage your comments regarding
traffic safety in this area. Citizens' wishing to comment may do so by calling (626) 569-2100 or via email at
publiccomment@cityofrosemead.org by 5:00 p.m.Please identify the topic you wish to comment in your email's subject line.All comments
are public record and will be recorded in the official record of the City. Written comments must be addressed to:
City of Rosemead
Public Works Department
8838 E.Valley Boulevard
Rosemead,California 91770
Attention: Public Works Department/Traffic Commission
To adhere to the Los Angeles County Health Officer's,updated June 11,2020,Revised Safer at Home Order,this meeting will be held via
teleconference and the public will have access to observe the meeting telephonically by calling 1 (267)866-0999, Code ID: 6163-10-9205
or visit www.cityofrosemead.org to watch online. Please note that, in accordance with Governor Newsom's Executive Order N-29-20 and
N-35-20,there will not be a physical location from which the public may attend.
Again, only comments received by 5:00 p.m. on the day of the meeting,will be accepted. We appreciate your concern for traffic safety in
the City of Rosemead. Should you have any questions regarding this letter,please contact the Public Works Department at 626-569-2150.
For information please call:
Ppparraobtener más informacibn,favor de Hamar al:
19PJ/l,,p-tfi, MITE:
De biet them chi tiet,xin pi:
626-569-2150
Proposed Improvements at 8834 Garvey Avenue
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