CC - Item 5A - Klingerman Street/Angelus Avenue Curve Traffic Evaluation M
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° ROSEMEAD CITY COUNCIL
CIVIC PRIDE STAFF REPORT
/N(-ORPORATED,ac)9
TO: THE HONORABLE MAYOR AND CITY COUNCIL
FROM: JEFF ALLRED, CITY MANAGER
DATE: JANUARY 26, 2016
SUBJECT: KLINGERMAN STREET/ANGELUS AVENUE CURVE TRAFFIC
EVALUATION
SUMMARY
Under the direction of the City Council, the City has retained Willdan Engineering
("Willdan") to conduct a thorough traffic evaluation for the curve at Klingerman Street
and Angelus Avenue, including speed, pedestrian, and safety concerns associated with
Rice Elementary School traffic. On December 16, 2015, Willdan completed the
evaluation, and submitted the technical report, summarizing the following:
• Existing roadway and traffic conditions
• Rice Elementary School Circulation
• Data collection, technical analysis, findings, and recommendations
The results of the technical report were presented to the Traffic Commission on January
7, 2016. After deliberation, the Traffic Commission voted to recommend that the City
Council approve Willdan's technical recommendations.
Staff Recommendation
The Traffic Commission recommends that the City Council approve Willdan's technical
recommendations, as follows:
1. Install all-way "STOP" control at the intersection of Angelus Avenue and Graves
Avenue;
2. Install interlocking delineators and raised round markers along the curve at
Klingerman Street and Angelus Avenue; and
3. Install additional "Chevron" sign(s) on each approach to the curve.
DISCUSSION
At the February 12, 2015 Traffic Commission meeting, a resident expressed speed and
safety concerns related to the curve at Klingerman Street and Angelus Avenue. The
City subsequently completed a traffic investigation, and the results were presented to
ITEM NO. 5.A
City Council Meeting
January 26. 2016
Page 2 of 3
the Traffic Commission, and then the City Council in April 2015. As approved by the
City Council, the City later installed edge line striping to narrow the travel lanes around
the curve, as well as "15 MPH" warning signs.
In the fall of 2015, under the direction of the City Council, Rosemead retained Willdan, a
professional traffic engineering company, to conduct a traffic evaluation for the curve
and the immediate surrounding area. On December 16, 2015, Willdan completed a
thorough traffic study (see attached) for the curve, including speed, pedestrian, and
safety concerns associated with Rice Elementary School traffic. Specifically, the study
included evaluation of partial or full closure (cul-de-sac) near the curve, pedestrian
safety crossing near the School, "STOP" signs at the approaches to the curve, and
supplemental traffic control. Highlights of Willdan's technical findings and
recommendations are summarized below.
• Partial and full closure of Klingerman/Angelus curve would result in diversion of
400 vehicles per day (vpd) and 900 vpd onto neighboring streets, respectively.
• The conflicts between pedestrians and vehicular traffic warrants installation of all-
way "STOP" at the Angelus/Graves intersection.
• "Adding "STOP" signs at the curve is not standard and is not justified."
• Supplemental traffic controls should be installed at the curve, including: (1) New
interlocking delineators and raised round markers along the centerline, and (2)
Chevron sign on each approach to the curve.
On January 7, 2016, Willdan's technical findings and recommendations were presented
to the Traffic Commission. Residents in the vicinity of the curve were informed of said
meeting. After deliberation, the Commission voted to recommend that the City Council
approve Willdan's technical recommendations, as follows:
1. Install all-way "STOP" control at the intersection of Angelus Avenue and Graves
Avenue;
2. Install interlocking delineators and raised round markers along the curve at
Klingerman Street and Angelus Avenue; and
3. Install additional "Chevron" sign(s) on each approach to the curve.
Last week, the City notified the residents near the curve and the Angelus/Graves
intersection, regarding today's City Council meeting. Additionally, the Principal of Rice
Elementary School has been consulted and is in support of the all-way "STOP"
installation at the Angelus/Graves intersection. Willdan has been requested to attend
the City Council meeting to answer any technical questions.
City Council Meeting
January 26,2016
Page 3 of 3
Public Notice
This agenda item has been noticed through the regular agenda notification process.
Prepared by: Submitted by:
(4 Li2--------
•nathan Wu, P.E. .E.
Anthony nthony La
'ublic Works Manager Interim Director of Public Works
Attachments
1- Location Map and Proposed Sign
2- Willdan's Traffic Evaluation Report(dated December 16. 2015)
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Proposed Interlocking Proposed Chevron
Delineators Sign Location
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GRAVES AVENUE
Proposed Improvements
Exhibit 1
WWI LLDAN I Angelus Avenue and Klingerman Street
Curve Evaluation(#101555)
Engineering City of Rosemead
WWI LLDAN your extending
Engineering reach
December 16, 2015
Mr. Rafael Fajardo, PE
City Engineer
City of Rosemead
8838 Valley Boulevard
Rosemead, CA 91770
Subject: Evaluation of the Curve at Angelus Avenue and Klingerman Street
Dear Mr. Fajardo:
REQUEST
In response to concerns regarding speeding and travel patterns around the curve at Angelus
Avenue and Klingerman Street, Willdan Engineering (Willdan) is pleased to submit our traffic
engineering evaluation of the curve and alternative solutions to the existing configuration.
Below is a Google Earth photo of the curve.
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• ,Photo 1: Klingerman Street runs east/west and Angelus Avenue runs north/south
EXISTING CONDITIONS
Approaches to the Curve
Observations were made of traffic circulation at Rice Elementary School on November 30 and
December 2, 2015. During the 11/30/15 visit. videos were recorded from a vehicle approaching
the curve from both northbound Angelus Avenue (see Photo 2) and eastbound Klingerman
Street. A series of alternating 15 delineators (not including one that is missing) and yellow
raised round markers are installed along the double yellow centerline on the curve.
Engineering and Planning I Energy Efficiency and Sustainability I Financial and Economic Consulting I National Preparedness and Interoperability
562.908.6200 1 800.499.4484 I fax:562.695.2120 1 13191 Crossroads Parkway North,Suite 405,Industry,California 91746-3443 I www.willdan.com
December 16, 2015
Page 2
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Photo 2: Screenshot from video of northbound Angelus Avenue approach.
On the northbound approach to the curve, the following standard traffic control devices are in
place on Angelus Avenue:
• A series of pavement legends stating "CURVE"- "AHEAD"-"15"
• Red flags mounted on both sides on the approach to the curve
• Left Curve Warning Sign mounted above a "15 MPH" advisory speed placard
• Left Curve 15 Warning Sign
• A series of three Left Pointing Chevron Signs
• Yellow Warning Marker by a guardrail
• Left Arrow Warning Sign
Similarly, the eastbound approach to the curve, the following standard traffic control devices are
in place on Klingerman Street, which has a right edge line (see Photo 3):
• A series of pavement legends stating "CURVE"- "AHEAD"-"15"
• Red flags mounted on both sides on the approach to the curve
• Right Curve Warning Sign mounted above a "15 MPH" advisory speed placard
• School Warning Sign mounted above a "SCHOOL" placard
• Right Curve 15 Warning Sign mounted on a street light pole
• A series of three Right Pointing Chevron Signs
• Yellow Warning Marker mounted behind the guardrail
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Photo 3: Screenshot from video of eastbound Klingerman St approach.
December 16, 2015
Page 3
Rice Elementary School Circulation
Photo 4 (Source: Google Earth, Imagery Date 3/24/15) shows Rice Elementary School with
three school crosswalks along Angelus Avenue (at Graves Avenue, Keim Street and Rush
Street).
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Photo 4: Angelus Avenue between Graves Avenue (top) and Rush Street(bottom).
December 16, 2015
Page 4
For student unloading and loading, drivers circulate through the southern lot. between Rush
Street and Keim Street, in a one-way counter clock wise direction, exiting at the east leg of the
Angelus Avenue and Keim Street intersection (see Photo 5, Source: Google Street View).
Some drivers/parents do not circulate through the lot to pick up a student and parallel park on
both sides of Angelus Avenue to pick-up/drop-off their students.
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Photo 5: School Lot exit driveway at Angelus Avenue and Keim Street(Circa July 2012)
One block to the north at Angelus Avenue at Graves Avenue, a crossing guard is present
(during the beginning and end of School) to assist pedestrians cross the uncontrolled north leg
of Angelus Avenue (see Photo 6). Many drivers exiting the southern School lot turn right onto
northbound Angelus Avenue to proceed to the curve. However, if pedestrians are crossing the
north leg of Angeles Avenue at Graves Avenue. some northbound drivers were observed
turning left onto westbound Graves Avenue to "bypass" the delay caused by the pedestrians.
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Photo 6: Screenshot of crossing guard assisting pedestrians cross north leg of Angelus Av at Graves Av.
December 16, 2015
Page 5
DATA
The most recent 3-year reported traffic collision history (1/1/12-12/31/14) for Klingerman
Street (east of Charlotte Avenue) and Angelus Avenue (north of Graves Avenue) indicates that
there was only one reported collision on the curve. Based on the Statewide Integrated Traffic
Records System (SWITRS) traffic collision data obtained from the California Highway Patrol, the
collision occurred at the intersection of Klingerman Street and Charlotte Avenue on August 20,
2014, when one vehicle broadsided another vehicle causing only property damage (i.e.. no
injuries).
Average daily traffic (24-hour directional) counts (Attachment A) were conducted on
Thursday. November 5, 2015 at the following locations (see Exhibit 1):
• Angelus Avenue between Graves Avenue and Klingerman Street
• Klingerman Street between Angelus Avenue and Charlotte Avenue
• Graves Avenue between Angelus Avenue and Charlotte Avenue
• Charlotte Avenue between Graves Avenue and Klingerman Street
• Gladys Avenue between Graves Avenue and Klingerman Street
The heaviest approach volumes (over a one hour period) to the curve are as follows:
• Eastbound Klingerman Street [421 vehicles per day (vpd). with 43 vehicles from 5:00
p.m. to 6:00 p.m.]
• Northbound Angelus Avenue (500 vpd. with 103 vehicles in from 7:45 a.m. to 8:45 a.m.)
The majority of the northbound traffic on Angelus Avenue during the a.m. peak hour is likely due
to parents dropping off their child at Rice Elementary School (start bell at 8:17 a.m.). During the
afternoon pick-up time (end bell at 2:35 p.m.), the northbound volume is 79 vehicles between
2:00 p.m. and 3:00 p.m.
Turning movement counts (Attachment B) at Angelus Avenue / Graves Avenue and San
Gabriel Boulevard / Klingerman Street were also conducted on November 5. 2015. These
counts (see Exhibit 2) indicate that the 83 vehicles from 7:30 a.m. to 8:30 a.m. travel on
northbound Angelus Avenue just north of Graves Avenue. These a. m. peak hour trips were
comprised of trips from the following approaches:
• Northbound Angelus Avenue Through Movement = 66 vehicles (80 percent)
• Eastbound Graves Avenue Left Turn Movement = 17 vehicles (20 percent)
Origin-destination surveys were conducted by recording the last four digits of the license plate
on vehicles passing through at the following locations on November 5, 2015 from 7:30 a.m. to
8:30 a.m. and from 2:15 p.m. to 3:15 p.m. (Attachment C):
• Angelus Avenue south of Graves Avenue
• Klingerman Street between Gladys Avenue and Charlotte Avenue
• Graves Avenue between Gladys Avenue and Charlotte Avenue
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As summarized in Exhibit 3, the predominant origin-destination movements through the curve
in each direction are as follows:
• Northbound Angelus Avenue (south of Graves Avenue) through the curve to westbound
Klingerman Street (west of Charlotte Avenue) = "Direction 1" (white line). Approximately
41 and 20 drivers used this route during the 7:30 a.m. to 8:30 a.m. and 2:15 p.m. to 3:15
p.m. survey period. respectively. Two vehicles that were documented during the a.m.
period apparently used this route to depart the area during the 2:15 p.m. to 3:15 p.m.
period.
• Eastbound Klingerman Street (west of Charlotte Avenue) through the curve to
southbound Angelus Avenue and then a right turn onto Graves Avenue = "Direction 6"
(yellow line). Approximately 9 and 5 drivers used this route during the 7:30 a.m. to 8:30
a.m. and 2:15 p.m. to 3:15 p.m. survey period, respectively.
Radar speed surveys were conducted on the morning and the afternoon of November 5, 2015
on the approach and departure legs of the curve (Attachment D). As summarized in Exhibit 4,
the highest 85`h percentile speeds recorded on the approaches are as follows:
• Northbound Angelus Avenue = 27 miles per hour (mph) during both one-hour survey
periods (i.e., 9:00 a.m. to 10:00 a.m. and 5:00 p.m. to 6:00 p.m.)
• Eastbound Klingerman Street = 31 mph from 5:00 p.m. to 6:00 p.m.
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Directional Volume Count
Direction AM Volume PM Volume In AM-Out PM Volume ■)10.-- Direction of Travel
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No Scale
Vehicle Circulation
Exhibit 3
Angelus Avenue and Klingerman Street
1A/W1 LLDAN I Curve Evaluation(#101555)
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December 16, 2015
Page 11
ANALYSIS
Mid-block Closure
An alternative to reduce eastbound Klingerman Street approach traffic to the curve is to install a
"half-closure" on Klingerman Street at Charlotte Avenue. Such a closure (see Photo 7 for an
example) would essentially make the Klingerman Street (just east of Charlotte Avenue) a one-
way westbound approach to Charlotte Avenue. This half-closure is not recommended because
it would divert a total of approximately 400 vehicles per day (vpd) onto the neighboring streets of
Charlotte Avenue and/or Gladys Avenue between Klingerman Street and Graves Avenue. This
alternative could be implemented in the northbound Angelus Avenue north of Graves Avenue.
The half-closure in this direction would divert roughly 500 vpd onto Graves Avenue.
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Photo 7: Half-closure on Baldwin St in Santa Cruz, CA. (Source: Google Street View, circa 4/2095)
A "full-closure" of the Klingerman Street/Angelus Avenue curve is not recommended. Such a
closure would divert a total of 900 vpd onto nearby residential streets (approximately 400 vpd
onto Charlotte Avenue and/or Gladys Avenue, as well as 500 vpd onto Graves Avenue).
Supplemental Traffic Control Devices
Photo 8 shows where a delineator is missing along the centerline of the curve. Most likely, the
impact of a vehicle caused the delineator to dislodge. During the recording of the videos, no
drivers were observed hitting any of the delineators or crossing the centerline. Photo 9 shows a
type of "interlocking" delineators that can probably withstand the impact of a vehicle better than
the current installation of "individual" delineators along the curve. If some more of the existing
delineators get dislodged, the City should consider replacing them with the interlocking
delineators.
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' Photo 8: Screen shot of missing delineator from curve centerline.
December 16, 2015
Page 12
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Photo 9: Interlocking delineators on Elk Grove Blvd in Elk Grove, CA (Source: Google Street View, 2015)
Photos 10 and 11 (video screen shots) shows the northbound Angelus Avenue and eastbound
Klingerman Street approach to the curve. respectively, where only two of the chevron signs are
visible. As described in the caption of each photo, an additional chevron sign should be
installed.
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Photo 10: Additional chevron sign should be installed between guardrail and telephone pole.
December 16, 2015
Page 13
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Photo 11:Additional chevron sign should be installed in between street name sign and telephone pole.
Another traffic control device considered was a STOP control in the curve. However, a mid-
block STOP control such as this is not standard and would not be considered at this location.
As a comparison, the 2014 California Manual on Uniform Traffic Control Devices (MUTCD)
provides guidelines for STOP control installations. The guidelines state STOP control should be
considered at a minor intersection if there are at least five correctable collisions in a 3-year
period. The Klingerman Street/Angelus Avenue curve is not a minor intersection and there were
• no reported collisions along the curve or its approaches for the recent 3-year period (1/1/12-
12/31/14). Adding STOP signs at the curve is not standard and is not justified as a measure to
reduce collisions.
Vehicular Speeds
Based on field observations conducted on November 30. 2015, some northbound drivers on
Angelus Avenue speed up to over 30 mph after stopping at Keim Street and then brake
suddenly to negotiate the curve. This behavior could be a result of northbound drivers having
two blocks (or - 900 feet between Keim Street and Klingerman Street) to accelerate before
reaching the curve. Installing stop controls on Angelus Avenue at Graves Avenue would reduce
this distance to approximately 500 feet. and likely reduce the amount of speeding on
northbound (NB) Angelus Avenue between Graves Avenue and the curve. The MUTCD states
that "STOP signs should not be used for speed control". Therefore. an analysis of Angelus
December 16, 2015
Page 14
Avenue at Graves Avenue was conducted to determine if right-of-way issues between vehicles
and/or pedestrians should be addressed with stop signs.
STOP Control on Angelus Avenue at Graves Avenue
The table below summarizes the criteria that will be used to evaluate the need for all-way STOP
control.
A. Collisions - Five or more reported crashes in a 12-month period that are
susceptible to correction by a multi-way stop installation. Such crashes
include right-turn and left-turn collisions as well as right-angle collisions.
B. Minimum Volume and Delay
1. The vehicular volume entering the intersection from the major
street approaches (total of both approaches) averages at least
300 vehicles per hour for any 8 hours of an average day:
2. and the combined vehicular, pedestrian, and bicycle volume
entering the intersection from the minor street approaches (total
of both approaches) averages at least 200 units per hour for the
same 8 hours, with an average delay to minor-street vehicular
traffic of at least 30 seconds per vehicle during the highest hour.
C. Other Criteria such as:
1. The need to control left-turn conflicts;
2. The need to control vehicle/pedestrian conflicts:
3. Locations where a road user, after stopping, cannot see
conflicting traffic and is not able to negotiate the
intersection unless conflicting cross traffic is also required to stop;
4. Characteristics where multi-way stop control would improve traffic
operational characteristics of the intersection.
Since there were not any reported collisions at the intersection of Angelus Avenue and Graves
Avenue during the recent 3-year period (1/1/12-12/31/14), the collision criteria for all-way stop
control was not met.
From the turning movement and pedestrian counts (summarized on Exhibit 2), 316 vehicles
entered the Angelus Avenue/Graves Avenue intersection from Angelus Avenue during
afternoon peak hour (2:15 p.m. — 3: 15 p.m.), while 192 pedestrians crossed the north leg of
Angelus Avenue and 53 vehicles entered the intersection from eastbound (EB) Graves Avenue.
During this one hour period in the afternoon, the MUTCD minimum volume criteria (stated
above) was met. However, it is not likely that this criteria (minimum 300 vph) was met any other
hour of the day since there were only 198 vehicles on Angelus Avenue that entered the
intersection during the morning peak hour (7:30 a.m. — 8:30 a.m.).
As for the other criteria, there is a substantial amount of left-turn conflicts at the intersection:
• 89 Northbound (NB) Angelus Avenue Left-turns vs. 181 pedestrians crossing west leg of
Graves Avenue from 7:30 a.m. to 8:30 a.m.
• 52 NB Angelus Avenue Left-turns vs. 255 pedestrians crossing west leg of Graves
Avenue from 2:15 p.m. to 3:15 p.m.
December 16, 2015
Page 15
There is also a substantial amount of vehicle/pedestrian conflicts at the crosswalk across the
north leg of Angelus Avenue:
• 43 vph on Southbound (SB) Angelus Avenue + 155 vph on NB Angelus Avenue vs. 76
pedestrians from 7:30 a.m. to 8:30 a.m.
• 26 vph on SB Angelus Avenue + 92 vph on NB Angelus Avenue vs. 192 pedestrians
from 2:15 p.m. to 3:15 p.m.
The installation of STOP signs on Angelus Avenue at Graves Avenue would create an all-way
stopped intersection. This would condition drivers on northbound and southbound Angelus
Avenue to stop all the time, and not just during the periods of a school day when the crossing
guard is present. This implementation of STOP signs would enhance safety at Angelus
Avenue/Graves Avenue, because drivers fall into the habit of stopping all the time before
entering the intersection and are less likely to collide with a crossing pedestrian.
CONCLUSIONS
Based on the evaluation provided, it is recommended the City install STOP signs on Angelus
Avenue at Graves Avenue, for the following benefits:
• Reduce the possibility of collisions involving NB-SB vehicles and pedestrians crossing
the north leg
• Reduce the possibility of collisions involving NB left-turns/SB right-turns and pedestrians
crossing the west leg
• Condition drivers on all approaches to stop before entering the intersection
• Reduce speeds of vehicles traveling NB on Angelus Avenue between Graves Avenue
and the curve
It is further recommended that additional traffic controls be installed along the curve including:
• Interlocking delineators to replace current individual delineators and raised round
markers along the centerline
• Another chevron sign on each approach to the curve
Thank you for the opportunity to be of continuing service to the City of Rosemead. Should you
have any questions regarding this analysis, please contact me at olum@willdan.com or
(510) 695-7434 or Mrs. Joanne Itagaki at jitaoaki @willdan.com or(562) 364-8519.
Respectfully submitted,
WILLDAN ENGINEERING
v7_`r ordon Lum, TE
roject Manager
Copy: Joanne Itagaki
101555/R01 Curve Evaluation GL12115 Final 2015-12-15