TC - Item 4A - Intersection of Walnut Grove Avenue at Grand Avenue0 0I -
TO: TRAFFIC COMMISSION
FROM: CHRIS MARCARELLO, PUBLIC WORKS DIRECTOR
DATE: MARCH 3, 2011
INTERSECTION OF R• i AVENUE
SUMMARY
Commissioner Lewin requested that an item be agendized to discuss the intersection of
Walnut Grove Avenue at Grand Avenue. He is interested in reviewing the intersection to
determine if traffic safety improvements or a traffic signal may be needed at the location.
According to the most recent traffic circulation study completed by the City, Walnut Grove
Avenue (from Mission Drive to Grand Avenue) is characterized as a secondary arterial with
4 traffic lanes and a roadway capacity of approximately 30,000 vehicles per day. The
average daily traffic was last recorded at 15,435 vehicles and the level of service (a ratio of
actual traffic to road capacity) was rated as "A" (on an "A° to "F" scale, with A being
adequate circulation).
It should be noted that this intersection is adjacent to a railroad crossing at the Union
Pacific Railroad line Oust north of this intersection). This railroad crossing is scheduled to
receive traffic safety improvements as part of the Alameda Corridor -East Project (ACE),
including new safety gates, railroad and traffic signals, pedestrian safety amenities, and a
new raised median. These improvements are on the ACE project list although a scheduled
construction date is not known at this time. When construction does occur, it is anticipated
that this intersection will experience traffic delays and potential closures.
Prior to conducting a warrant study of this intersection, staff is interested in discussing this
item further with the Commission. As the Commission is aware, the cost of installing a new
traffic signal is high and there may be other short-term improvements available to improve
conditions at the intersection.
Staff Recommendation
Staff recommends that the Traffic Commission discuss the intersection at Walnut Grove
Avenue /Grand Avenue and provide direction to staff.
Attachment 1: Traffic Circulation Analysis — Walnut Grove Avenue (Mission Drive to
Grand Avenue)
Existing (2007) Conditions
Table 6 - Roadway Segment Levels of Service for Existing Conditions (tear 2007)
Primary Street
WE End of
Segment
SM7 End of
Segment
Roadway
Class
No. of
Lanes
Roadway
Capacity
Existing (2007) Conditions
Volumes
v/C
LOS
I
Walnut Grove Av
Grand Ave
Mission Drive
Secondary
4
30,000
15,435
0.515
A
2
Walnut Grove Av
Wells /Edmond
Valley Blvd
Secondary
4
30,000
22,805
0.760
C
3
Walnut Grove Av
Valley Blvd
Marshall St
Secondary
4
30,000
29,339
0.978
E
4
Walnut Grove Av
Hellman Ave
Garvey Ave
Secondary
4
30,000
26,474
0.882
D
5
Walnut Grove Av
Fern Ave
Klingerman St
Secondary
4
30,000
25,897
0.863
D
6
Walnut Grove Av
Rush St
Landis View Lane
Secondary
4
30,000
18,042
0.601
B
7
San Gabriel Blvd
Hellman Ave
Emerson Place
Major
4
40,000
33,617
0.840
D
8
San Gabriel Blvd
Garvey Ave
Klingerman St -
Major
4
40,000
29,877
0.747
C
9
San Gabriel Blvd
Delta Ave
Walnut Grove Ave
Major
4
40,000
22,382
0.560
A
10
Del Mar Ave
Hellman Ave
Emerson Place
Secondary
4
30,000
24,933
0.831
D
I I
Del Mar Ave
Garvey Ave
Newmark Ave
Secondary
4
30,000
23,599
0.787
C
12
New Ave
Newmark Ave
Graves Ave
Collector
2
15,000
10,598
0.707
C
13
Valley Blvd
Muscatel Ave
Ivar Ave
Major
4
40,000
40,989
1.025
F
14
Valley Blvd
Hart Ave
Mission Drive
Major
4
40,000
17,326
0.433
A
15
Valley Blvd
Rio Hondo Ave
Temple City Blvd
Major
4
40,000
27,271
0.682
B
16
Temple City Blvd
Valley Blvd
Marshall St
Secondary
4
30,000
21,437
0,715
C
17
Garvey Ave
New Ave
Del Mar Ave
Major
4
40,000
21,667
0.542
A
IB
Garvey Ave
Del Mar Ave
San Gabriel Blvd
Major
4
40,000
31,299
0.782
C
19
Garvey Ave
San Gabriel Blvd
Walnut Grove Ave
Major
4
40,000
31,684
0.792
C
20
Garvey Ave
Walnut Grove Ave
Rosemead Blvd
Major
4
40,000
33,366
0.834
D
21
Rosemead Blvd
Lower Azusa Road
Mission Drive
Major
5
50,000
55,472
1.109
F
22
Rosemead Blvd
Valley Blvd
Marshall St
Major
4
40,000
62,209
1.555
F
23
Rosemead Blvd
Telstar Ave
Whitmore St
Major
6
60,000
59,926
0.999
E
As indicated by the analysis summary within Table 6, five roadway segments currently operate at LOS E
or F. These locations are indicated by bold text within the table:
® Walnut Grove Avenue between Valley Boulevard and Marshall Street (LOS E)
® Valley Boulevard between Muscatel Avenue and Ivar Avenue (LOS F)
• Rosemead Boulevard between Lower Azusa Road and Mission Drive (LOS F)
• Rosemead Boulevard between Valley Boulevard and Marshall Street (LOS F)
• Rosemead Boulevard between Telstar Avenue and Whitmore Street (LOS E)
Rosemead Circulation Element Update
A CORPORATION Traffic Impact Analysis
,pF.- May 19, 2008 -Page 33