TC - Item 3B - Traffic Review Along Driggs Avenue and Heglis Avenue South of Whitmore StreetROSEMEAD TRAFFIC COMMISSION
TO: TRAFFIC COMMISSION
FROM: GLORIA MOLLEDA, CITY MANAGER
DATE: OCTOBER 7, 2021
STAFF REPORT
SUBJECT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEGLIS AVENUE
SOUTH OF WHITMORE STREET
SUMMARY
On behalf of the City of Rosemead, engineering staff completed a traffic review and recommended
appropriate traffic measures along the curve where Driggs Avenue meets Heglis Avenue south of
Whitmore Street.
The City of Rosemead received a resident request to review the parking conditions along the
segment of Driggs Avenue and Heglis Avenue south of Whitmore Street. The resident has reported
that due to vehicles being parked along both sides of Driggs Avenue/ Heglis Avenue, it is difficult
for traffic to see pedestrians and oncoming vehicles. The resident reported that this segment of
Driggs Avenue is a popular area for senior citizens and families with small children to walk along
during the morning and evening hours. Since there are no sidewalks along this segment, the
resident requested for red curb to be installed along both sides of Driggs Avenue near the curve in
the road to deter vehicles from parking along that segment.
ANALYSIS
The traffic review included an analysis of the existing roadway conditions, data collection of
average daily traffic (ADT) counts, a 24-hour speed survey and a review of 6.5 -years of available
collision data along this segment.
Driggs Avenue: Driggs Avenue is a north/south local roadway and is approximately 30 -feet wide,
with one lane in each direction, no marked centerline separating opposing traffic along Driggs
Avenue, and a prima facie speed limit of 25 MPH. Parking along both sides of Driggs Avenue is
allowed anytime except on Fridays from 6:00 AM to 10:00 AM due to street sweeping. Land use
through this segment of Driggs Avenue is primarily Single Family Residential. The east side of
Driggs Avenue is in the City of El Monte.
Heglis Avenue: Heglis Avenue is a north/south local roadway and is approximately 30 -feet wide,
with one lane in each direction, no marked centerline separating opposing traffic and has a prima
facie speed limit of 25 MPH. Parking along both sides (east and west sides) of Heglis Avenue is
City Traffic Commission Meeting
October 7, 2021
Page 2 of 3
allowed anytime except on Fridays from 6:00 AM to 10:00 AM due to street sweeping. Land use
through this segment of Heglis Avenue is primarily Single Family Residential.
Whitmore Street: Whitmore Street is an east/west Local roadway and is approximately 30 -feet
wide, with one lane in each direction, no marked centerline separating opposing traffic along
Whitmore Street, and a prima facie speed limit of 25 MPH. Parking along both sides (north and
south sides) of Whitmore Street is allowed anytime except on Fridays from 6:00 AM to 10:00 AM
due to street sweeping. Land use through this segment of Whitmore Street is primarily Single
Family Residential.
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
of all collisions that occurred along Driggs Avenue was conducted over a 6.5 -year period between
January 2015 to the most recent available accident data, May 2021. There were no reported
accidents.
Average Daily Traffic (ADT) data was obtained from counts taken on September 9th, 2021, for
Driggs Avenue while schools were in session. The ADT was determined to be 53 vehicles per day.
To assess the speed at which vehicles are traveling along Driggs Avenue, speed samples were
taken. A 24-hour speed sample was taken on September 9th, 2021. The 85th percentile speed of
vehicles along Driggs Avenue is at 24 mph. This translates to mean that 85 percent of the vehicles
sampled are traveling at 24 mph or below which is below the speed limit of 25 mph.
STAFF RECOMMENDATION
After a thorough review of existing field and traffic conditions and per the California Manual on
Uniform Traffic Control Devices (CAMUTCD), California Vehicle Code (CVC), based on the
traffic review and engineering judgement, it was determined that chevron alignment signs should
be installed along the far end of the curve to improve awareness of vehicles approaching the curve.
It was also determined that a center line consisting of a solid double yellow line should be installed
at the curve of the intersection to ensure vehicles stay in their correct lane while turning as well as
some red curb at the apex of the curve. Please refer to Figure 4 for a visual demonstration of the
proposed conditions.
A detailed traffic report and proposed figure diagram is attached as Attachment A to this staff
report, please refer to the proposed diagram (Figure 4) in the attachment.
Below is a detailed list of the recommendations, these improvements are also shown on Figure 4
of Attachment A:
1. Install approximately 130 -foot -long center line consisting of a solid double yellow line
along the curve between 3108 and 3119 Driggs Ave with raised pavement markers
(RPMs) along the yellow center lines. Detail 22. Per CAMUTCD Section 3B.01.
City Traffic Commission Meeting
October 7, 2021
Page 3 of 3
2. Install Chevron Alignment signs (WI -8) along the curve to provide additional emphasis
and guidance for a change in horizontal alignment. The Chevron Alignment sign shall
be a vertical rectangle, without a border. Chevron Alignment signs shall be installed on
the outside of a turn or curve, in line with and approximately a right angle to
approaching traffic. Detail 22. Per CAMUTCD Section 2C.09 and Figure 2C-2.
Install approximately 120 feet of red curb at the curve beginning at the west edge of
the driveway at 3119 Driggs Avenue. The curve is too narrow to allow parking on both
sides of the street. Per CAMUTCD 3B.23.
Prepared by:
Jana Robbins, Contract Traffic Engineering Division
Attachments:
A. Attachment A - Technical Engineering Report
TRANSTEch
TO: City of Rosemead, Public Works Department
FROM: Traffic Engineering, Transtech Engineers, Inc.
DATE: September 29, 2021
SUBJECT: Traffic Review along Driggs Avenue and Heglis Avenue South of Whitmore Street
INTRODUCTION/BACKGROUND
On behalf of the City of Rosemead, engineering staff completed a traffic review and recommended
appropriate traffic measures along the curve where Driggs Avenue meets Heglis Avenue south of Witmore
Street. The City of Rosemead received a resident request to review the parking conditions along the
segment of Driggs Avenue and Heglis Avenue south of Whitmore Street. The resident is reported that
due to vehicles being parked along both sides of Driggs Avenue/ Heglis Avenue, it is difficult for traffic to
see pedestrians and oncoming vehicles. The resident reported that this segment of Driggs Avenue is a
popular area for senior citizens and families with small children to walk along during the morning and
evening hours. Since there are no sidewalks along this segment, the resident requested for red curb to be
added along both sides of Driggs Avenue near the curve in the road to deter vehicles from parking along
that segment. The traffic review included an analysis of the existing roadway conditions, data collection
of average daily traffic (ADT) counts, a 24-hour speed survey and a review of 6.5 -years of available collision
data along this segment. Please refer to Figure 1 below for a vicinity map of the subject location.
Figure 1: Vicinity Map
o
- Whitmore St o
%
^ ?. e
� T
LEGEND Location of 3108 Heglis Ave and 3119
City of EI Monte City of South EI Monte
Driggs Ave
"t CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 1 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
Figure 2: Existing Conditions Map
Driggs Avenue: Driggs Avenue is a north/south local roadway and is approximately 30 -feet wide, with one
lane in each direction, no marked centerline separating opposing traffic along Driggs Avenue, and a prima
facie speed limit of 25 MPH. Parking along both sides of Driggs Avenue is allowed anytime except on
Fridays from 6:00 AM to 10:00 AM due to street sweeping. Land use through this segment of Driggs
Avenue is primarily Single Family Residential. The east side of Driggs Avenue is in the City of EI Monte.
Heglis Avenue: Heglis Avenue is a north/south local roadway and is approximately 30 -feet wide, with one
lane in each direction, no marked centerline separating opposing traffic and has a prima facie speed limit
of 25 MPH. Parking along both sides (east and west sides) of Heglis Avenue is allowed anytime except on
Fridays from 6:00 AM to 10:00 AM due to street sweeping. Land use through this segment of Heglis
Avenue is primarily Single Family Residential.
Whitmore Street: Whitmore Street is an east/west Local roadway and is approximately 30 -feet wide, with
one lane in each direction, no marked centerline separating opposing traffic along Whitmore Street, and
a prima facie speed limit of 25 MPH. Parking along both sides (north and south sides) of Whitmore Street
is allowed anytime except on Fridays from 6:00 AM to 10:00 AM due to street sweeping. Land use through
this segment of Whitmore Street is primarily Single Family Residential.
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 2 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
PICTURE SUMMARY: EXISTING CONDITIONS
a
Southbound along Heglis Avenue, prior to Driggs Avenue
q1� F
Northbound along Driggs Avenue (South of Whitmore)
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 3 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
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 of all collisions that
occurred along Driggs Avenue was conducted over a 6.5 -year period between January 2015 to the most
recent available accident data, May 2021. Based on the information provided, a summary breakdown of
the number of collisions per year is shown below.
2021 (Up to May 2021): 0 Collisions
2020:
0 Collisions
2019:
0 Collisions
2018:
0 Collisions
2017:
0 Collisions
2016:
0 Collisions
2015:
0 Collisions
As shown on the summary breakdown for the collisions per year, there were no collisions reported along
Driggs Avenue.
AVERAGE DAILY TRAFFIC (ADT)
Average Daily Traffic (ADT) data was obtained from counts taken on September 9th, 2021 for Driggs
Avenue while schools were in session. A summary of ADT data is shown in Table 1: Average Daily Traffic
(ADT).
Table 1: 2021 Average Daily Traffic (ADT)
Location Vehicles per Day (vpd)
Driggs Avenue 53
RADAR SPEED SURVEY
To assess the speed at which vehicles are traveling along Driggs Avenue, speed samples were taken. A
24-hour speed sample was taken on September 9th, 2021. The 85`" percentile speed of vehicles along
Driggs Avenue is at 24 mph. This translates to mean that 85 percent of the vehicles sampled are traveling
at 24 mph or below which is below the speed limit of 25 mph. Table 2 below shows the September 91",
2021 speed survey results. The speed summary is attached (Attachment 2) at the end of the report.
Table 2: Radar Speed Survey along Driggs
Avenue
Dir. o
Date/Time o
Location
5%ile Speed
Posted Limit MPH
Travel
Survey
9/09/21
Driggs Avenue
NB/SB
24
25
24-hour
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 4 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
YELLOW CENTER LINE PAVEMENT MARKINGS AND WARRANTS
The CAMUTCD Section 3B.01 provides the following standard on center lines: Center line pavement
markings, when used, shall be the pavement markings used to delineate the separation of traffic lanes
that have opposite directions of travel on a roadway and shall be painted yellow. On roadways without
continuous center line pavement markings, short sections may be marked with center line pavement
markings to control the position of traffic at specific locations, such as around curves, over hills, on
approaches to grade crossings, at grade crossings, and at bridges.
The center line markings on two-lane, two-way roadways shall be one of the following as shown in
Figure 3:
A. Two -direction passing zone markings consisting of a normal broken yellow line where crossingthe
center line markings for passing with care is permitted for traffic traveling in either direction;
B. One -direction no -passing zone markings consisting of a double yellow line, one of which is a
normal broken yellow line and the other is a normal solid yellow line, where crossing the center
line markings for passing with care is permitted for the traffic traveling adjacent to the broken
line, but is prohibited for traffic traveling adjacent to the solid line; or
C. Two -direction no -passing zone markings consisting of two normal solid yellow lines where
crossing the center line markings for passing is prohibited for traffic traveling in either direction.
A single solid yellow line shall not be used as a center line marking on a two-way roadway. The center line
markings on undivided two-way roadways with four or more lanes for moving motor vehicle traffic always
available shall be the two -direction no -passing zone markings consisting of a solid
double yellow line as shown in Figure 3.
Figure 3. Examples of Two -Lane, Two -Way Marking Applications (CAMUTCD Figure 36-1)
The installation of all traffic control devices on public streets are guided by the California Manual on
Uniform Traffic Control Devices (CAMUTCD), the California Vehicle Code (CVC) and engineering
judgement.
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 5 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
RECOMMENDATIONS
After a thorough review of existing field and traffic conditions and pert he California Manual on Uniform
Traffic Control Devices (CAMUTCD), California Vehicle Code (CVC), based on the traffic review and
engineering judgement, it was determined that chevron alignment signs should be installed along the far
end of the curve to improve awareness of vehicles approaching the curve. It was also determined that a
center line consisting of a solid double yellow line should be installed at the curve of the intersection to
ensure vehicles stay in their correct lane while turning as well as some red curb at the apex of the curve.
Please refer to Figure 4 for a visual demonstration of the proposed conditions.
1. Install approximately 130 -foot -long center line consisting of a solid double yellow line along the
curve between 3108 and 3119 Driggs Ave with raised pavement markers (RPMs) along the yellow
center lines. Detail 22. Per CAMUTCD Section 36.01.
2. Install Chevron Alignment signs (W1-8) along the curve to provide additional emphasis and
guidance for a change in horizontal alignment. The Chevron Alignment sign shall be a vertical
rectangle, without a border. Chevron Alignment signs shall be installed on the outside of a turn
or curve, in line with and approximately a right angle to approaching traffic. Detail 22. Per
CAMUTCD Section 2C.09 and Figure 2C-2.
3. Install approximately 120 feet of red curb atthe curve beginning atthe west edge of the driveway
at 3119 Driggs Avenue. The curve is too narrow to allow parking on both sides of the street. Per
CAMUTCD 36.23.
Figure 4: Proposed Recommendations
43 Install 120 feet of red curb
alongthe northside of Driggs
s Avenue. Begin red curb west
t� of the edge of Driveway at
RRRR ;. 3119 Driggs Avenue
t
Rl�
(W1 8) both directions on light
pole
Driveway located at 3119
Driggs Ave
r
I.)
Paint 80 feet of center line at
ie curve. (Double Yellow). With
RPMs along the yellow lines.
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 6 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
ATTACHMENTS
1. Average Daily Traffic (ADT) Counts
a. Driggs Avenue 250 -feet south of Whitmore Street
2. Average Daily Traffic (ADT) Speed Survey
a. Driggs Avenue 250 -feet south of Whitmore Street
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 7 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
Attachment 1: Average Daily Traffic (ADT) Counts
Prepared by NDS/AM
Preparetl by NeHonal Dale 8 Sury ln06eMcec
VOLUME
Driggs Ave 250' S/0 Whitmore St
Day: Thursday City: Rosemead
Date: 9/9/2021 Pro/eR4: CA21_020235 001
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 8 of 9
DAILY
30
23
0
r
53
AM Period
SB
EB
TOTAL
PM Period
SB
EB
TOTAL
00:00
0•
0
0 0•(12
12:00
0•
1
0 0•
1
WAS
0
0
0 0
12:15
0
0
0 0
00:30
0
0
0 0
12:30
1
2
0 0
3
00:450
0
0 0
12:45
1
2
0 3
0 0
1
5
01:00
0
0
0 0
13:00
0
1
0 0
1
01:15
0
0
0 0
13:15
0
0
0 0
01:30
1
0
0 0
13:30
1
0
0 0
1
01:450
1
0
0 0
13:45
0
1
1 2
0 0
1
3
02:00
0
0
0 0
14:00
1
0
0 0
1
02:15
0
0
0 0
14:15
0
0
0 0
02:30
0
0
0 0
14:30
0
0
0 0
02:5
0
0
0 0
14:45
1
2
0
0 0
1
2
03:00
0
0
0 0
15:00
0
0
0 0
03:15
0
0
0 0
15:15
1
0
0 0
1
03:30
0
0
0 0
15:30
1
0
0 0
1
03:45
0
0
0 0
15:45
0
2
2 2
0 0
2
4
04:00
0
0
0 0
16:00
1
1
0 0
2
"Us
0
0
0 0
16:15
1
0
0 0
1
04:30
0
0
0 0
16:30
0
0
0 0
04:45
0
0
0 0
16:451
3
0 1
0 0
1
4
05:00
0
0
0 0
17:00
0
0
0 0
05:15
0
0
0 0
17:15
0
1
0 0
1
05:30
0
0
0 0
17:30
1
0
0 0
1
05:45I
1
0
0 0
17:45
0
1
0 1
0 0
2
06:00
0
0
0 0
19:00
0
0
0 0
06:15
0
0
0 0
19:15
2
1
0 0
3
06:30
1
0
0 0
18:30
0
1
0 0
1
06:45
1
2
0
0 0
18:45
0
2
0 2
0 0
4
07:00
1
1
0 0
2
19:00
0
0
0 0
VA5
0
2
0 0
2
19:15
0
0
0 0
":30
1
0
0 0
1
19:30
0
0
0 0
0]:45
1 1
3
0
3
0 0
1
6
1 19:45
1 0
1 1
0 0
1
1
09:00
0
0
0 0
20:00
0
1
0 0
1
WAS
0
0
0 0
20:15
1
0
0 0
1
08:30
0
0
0 0
20:30
0
2
0 0
2
WAS
0
0
0 0
20:45
0
1
0 3
0 0
4
09:00
0
0
0 0
21:00
1
0
0 0
1
09:15
1
0
0 0
1
21:15
0
0
0 0
09:30
1
0
0 0
1
21:30
0
1
0 0
1
09:45
0
2
0
0 0
2
21:45
22:00
0
1
0 1
0 0
2
10:00
0 1 0 0
1
0 0 0 0
10:15
2
0
0 0
22:15
1
0
0 0
1
10:30
0
1
0 0
1
22:30
0
0
0 0
10:45
1
3
1
3
0 0
2
6
22:45
0
1
0
0 0
1
11:00
0
0
0 0
23:00
0
0
0 0
11:15
1
0
0 0
1
23:15
0
0
0 0
11:30
0
1
0 0
1
23:30
0
0
0 0
11:45
1
2
0
1
0 0
1
3
23450
0
0 0
TOTALS
14
7
21
TOTALS
16
16
32
SPLIT%
1
66.7%
33.3%
39.656
SPLIT%
1
50.0%
50.0%
006,DAILY
TOTALS
NB
SB
LB
WIS
101al
30
23
0
0
53
AM Peak Hour
06:15
W:30
06:30
PM Peak Hour
14:45
1945
5:15
AM Pk Volume
3
3
6
PM Pk Volume
3
4
6
Pk Hr Factor
0.750
0.375
0.750
Pk Hr FaRar
0.750
0.500
M750
7-9Vo1ume
3
3
6
4-6 Volume
4
2
6
7-9 Peak Hour
07:00
07:00
07:00
4-6 Peak Hour
16:00
16:00
16:00
7-9 Pk Volume
3
3
6
4-6 Pk Volume
3
1
4
Pk Hr Fador
0.750
0.375
0.750
Pk Hr FaR4r
0750
0.250
0.500
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 8 of 9
TECHNICAL REPORT: TRAFFIC REVIEW ALONG DRIGGS AVENUE AND HEG LIS AVENUE SOUTH OF WHITMORE STREET
Attachment 2: Average Daily Traffic (ADT) Speed Survey
P,ep..a er rveimx w a wr%me s..lme
SPEED
Driggs Ave 250'S/0 Whitmore St
Day: Thursday City: Rosemead
Date: 9/9/2021 Project M: CA21_020235_001
Summary
AM Volumes
8
J
5
1
0
0
0
0 0
0
00
0
21
%AM
WOO AM
0
0
0
0
0
0
0
0
0
0
0
0
0
0
]LOO
1
0
0
0
0
0
0
0
0
0
0
0
0
1
02:00
a
0
0
0
0
0
0
0
a
0
0
0
0
0
03:00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0400
a
0
0
0
0
0
0
o
a
0
a
0
0
0
05:00
1
0
0
a
0
0
0
0
0
0
0
0
0
1
06:00
2
0
0
0
0
0
0
0
a
0
a
0
0
2
07:00
2
2
2
0
0
0
0
0
0
0
0
0
0
6
08:00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
09:00
0
1
0
1
0
0
0
0
0
0
0
0
0
2
10:00
2
3
1
a
0
0
0
0
0
0
0
0
0
6
11:00
0
1
2
0
0
0
0
0
0
0
0
0
0
3
1200 PM
1
3
1
0
0
0
0
0
a
0
0
0
0
5
13:00
1
1
1
a
0
0
0
0
0
0
0
0
0
3
1400
0
1
1
0
0
0
0
0
0
0
0
0
0
2
15:00
0
2
1
1
0
0
a
0
0
0
0
0
0
4
16:00
2
0
2
0
0
0
0
0
a
0
0
0
0
4
12:00
0
1
1
0
0
0
0
0
0
0
0
0
0
2
18:00
1
1
2
a
0
0
0
0
a
0
0
0
0
4
19:00
1
0
0
0
0
0
0
0
0
0
0
0
0
1
20:00
1
2
1
0
0
0
0
0
0
0
a
0
0
4
21:00
0
1
0
1
00
0
0
a
0
0
0
0
2
22:00
0
0
0
1
0
0
0
0
0
0
0
0
0
1
23:00
0
0
0
0
0
0
0
0
0
0
0
0
0
0
%ol Tomis
28%
36%tee—
28%
0%
100%
AM Volumes
8
J
5
1
0
0
0
0 0
0
00
0
21
%AM
15%
13%
9%
2%
40%
AM Peak Hour0:00
10:00
07:W
0900
0)00
Volume
2
3
2
1
6
PM Volume,
J
12
10
3
0
0
0 0
0
0
0
0
32
%PM
13%
23%
1S%
6%
60%
PM Peak Hour
16'M
12:00
16:W
15:00
12:00
Volume
2
3
2
1
5
Directional Peak Periods
AM 7-9
NOON 12-2 PM 46
Off Peak Volumes
All Speeds
volume %
Volume % volume %
volume %
6 11%
8 15% 6 11%
33 62%
ki 15th 50th Average 85th 95th ADT i
ee;Ave Summary 10 18 18 24 2] 53
CITY OF ROSEMEAD
Prepared By: Transtech Engineers, Inc. I Page 9 of 9