01-07-1997 - Request for Traffic Signal at the Intersection of Amar Road & Westport Street0
City of West Covina
TO:
FROM:
SUBJECT:
City Manager and City Council
Memorandum
AGENDA.
Patrick J. Glover ITEM No. D-1
City Engineer/Public Works Director DATE January 7, 1997
REQUEST FOR TRAFFIC SIGNAL AT THE INTERSECTION
OF AMAR ROAD AND WESTPORT STREET
SUMMARY: At it!
Comr
Amar
that
condi
evalu
reque
BACKGROUND
meeting on December 17, 1996, , the Traffic
ittee reviewed conditions at the intersection of
load and Westport Street. The Committee found
ne of the eleven warrants reviewed met the
ions for a traffic signal. Based on their
tion, the Traffic Committee recommended that the
1 be denied.
Amar Road from Valinda Avenue to Nogales Street carries the second largest traffic
volumes of any roadway within the.City of West Covina. With average daily traffic counts
of 42,000 and critical approach speeds of 49 mph, it is the busiest ,east west traffic
corridor south of the 1-10 freeway.. Westport Street is a 40 wide by 100 long residential
street which serves as an outlet to Amar Road for a residential development located
south of Amar Road between Temple Avenue and Shadow Oak Drive. Approximately
700 to 900 vehicles per day use Westport Street to access Amar Road. A small map of
this area has been attached to this report.
Over the past 10 years, the Traffic Committee has reviewed and analyzed traffic data at
this intersection on 7 occasions. The past Traffic Committee recommendations have
been to deny the request for a traffic signal at this location. However, to improve the
ability of residents to access Amar Road the following recommended modifications were
made.
1. In April, 1988, the City Council approved the Traffic Committee's recommendation
to prohibit right hand turns from Temple Avenue onto eastbound Amar Road
during peak traffic hours in order to provide breaks in the traffic to allow Westport
Street traffic to turn both east and west onto Amar Road..
.2. In January, 11995, the City Council approved the Traffic Committee's
recommendation to install a protected U-tum green arrow at the intersection of
Shadow Oak and Amar. This improvement allows the motorist on Westport Street
who wants to Igo west onto Amar Road tofirst go east on Amar to Shadow Oak
and do a U-turn rather than make a left turn across Amar. This route take
approximately 45 seconds to 2 minutes more than making a left turn across Amar
Road directly from Westport depending of how long the green arrow takes to cycle.
If these two improvements do not meet the safety concerns of the motorist the option of
going 'east on Greenleaf to Woodgate Drive then north on Shadow Oak provides for a
protected left turn onto Amar Road with only minor delays.
During the Novemb
construction of a gue
and Shadow Oak Dr 1
onto Amar. The gu,
early 1997. Durin
requested that the is;
Committee reviewed
er 19, 1996, City Council meeting, the Council approved the
rdrail along the south side of Amar Road between Westport Street
ve to provide protection for the residents whose property backs up
rrdrail is currently being designed and construction should start in
g Council discussions on the guardrail, Councilmember Herfert
sue of a traffic signal at Westport Street be agendized. The Traffic
:his matter at their December 17, 1996 meeting.
City Manager and City Council
January 7, 1997
Page Two
ANALYSIS
Throughout each, year,..numerous requests for traffic signals are reviewed by. the Traffic
Committee. Each request is analyzed by 'comparing the traffic data to a Federally
recognized set of 11 traffic signal warrants:. A warrant is a set of criteria that is used to
define the relative need for a particular traffic control device and is intended to assure
motorist and pedestrian safety and convenience. 'Warrants are a series of guidelines that
are used to help evaluate the situation at hand and are not absolute values.
The warrants look at things such as traffic and _pedestrian volumes, location of nearest
signals and 'accident history. Of the 11 warrants checked only the progressive movement
(warrant #5) is met. This warrant expresses the desirability of holding traffic in compact
groups called platoons and -thus provide better speed control as the platoon moves
through ,a series of synchronized intersections with signals. The evaluation of .the 11
traffic signal warrants,and an accident history are attached to this report.
Because warrants are tools used to help evaluate conditions, there are no hard and fast
rules as to how many must be met. before a1raffic signal should be installed. Typically,
the satisfaction_ of the progressive movement, warrant would not be a basis for the Traffic
Committee to recommend the installation of a traffic signal. The Committee did carefully,
review the accident history on Amar Road west of Westport Street and found that this
stretch, of roadway does have a history of ran -off -the -road accidents which are currently
being reviewed by staff. But even with this consideration, the Committee recommended
that the request be denied based on .the following:
• The residents have two safe options for exiting their development onto Amar Road via
a U-turn at Shadow Oak or a left turn onto Amar Road at Shadow Oak Drive via
Woo,dgate.
• Traffic signals can oftentimes result in an increase frequency of rear end accidents
• The traffic volumes and accident history did not meet warrants for a traffic signal at
this location. -
• The accident history on Amar Road between Westport Street and Shadow Oak Drive
needs further study with a complete, pavement friction analysis to better determine if
speed or`roadway conditions are the main cause of these accidents. This study is
now being done.
FISCAL IMPACT
If the, City Council directs staff to install the traffic signal based on the warrant for
progressive movement, the cost for the project would be as follows:
Traffic signal installation $ 90,000
Connecting the new signal into a computer controlled
series with the other Signals on Amar Road '40,000
Miscellaneous design and contingencies 15,000
Total $145,000
n
City Manager and City Council
January 7, 1997
Page Three
The reason the signals on Amar Road need to be linked to the other 5 is so that they can
be programmed to group vehicles together which is the key to satisfying the warrant for
progressive movement.
The recommended funding source for the signal is Gas Tax which has been allocated for
street repair work in the 1996-97 Capital Improvement Program. The $145,000 needed
for this project would resurface about 450,000 square feet of street which is
approximately 15 typical residential streets.
ALTERNATIVES
The alternative to the Traffic Committee's recommendation is to install the signal based
on the satisfaction of the warrant for progressive movement.
RECOMMENDATION
If the City Council agrees with the Traffic Committee's recommendation, this report
should be received and filed. If the Council desires a traffic signal, it should direct the
City Engineer to prepare plans and specifications for a traffic signal at Amar Road and
Westport Street.
rat!dck4I0GIove'r .
City Engineer/Public Works Director
PJG:gc
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Traffic Manual
-& TR IC SIGNALS AND LIGHT1,P4G
•7992
Y
Figure 9-1
TRAFFIC
SIGNAL WARRANTS
CALC L H DATE
Z 1 mZ %r C
DIST FITE PM
CHK _(T TW DATE
ro
Major St:
Critical Approach Speed
mph
Minor St: w e S +' Ph ri E r
Critical Approach Speed
mph
Critical speed of major street traffic >_ 40 mph
— _ _ _ _ _ --- _ _ _ _ — a
or -J
RURAL (R)
In built up area of isolated community of < 1o,000 pop. _ _ _ _ _ _ _ _ _ ❑
❑ URBAN (U)
WARRANT 1 - Minimum Vehicular Volume
100% SATISFIED YES ❑
NO
80% SATISFIED YES ❑
NO
MINIMUM REQUIREMENTS
(80% SHOWN IN BRACKETS)
APPROACH
R
R
0 0
LANES
2 o
more
amour
Both Apprchs.
Major Street
500
(400)
280)
600
(480)
420
(336)
31
35 248
1825280
33
37135
Highest Apprch.
1
20)
10s
(84)
No
((112)
140
62
-78 Jrl .
46
49
46
51
6 6MinorSReet
AM 5Gj)
WARRANT 2 - Interruption of Continuous Traffic
100'/o SATISFIED
YES ❑
NO
MINIMUM REQUIREMENTS
80% SATISFIED
YES
NO ❑
(80% SHOWN IN BRACKETS)
R R
APPROACH 2 or ore
LANES
O
Both Apprchs. 750 900 630
our
Major street (soo) (420; (720) (504 312 56
1825 $OQ 36
373 3
HighestApprch. 53 70 r62 78
Street 60} (42) (8 (56)AVO
31 46 49 4s
�51 6Minor
WARRANT 3 - Minimum Pedestrian Volume
100% SATISFIED
YES ❑
NO -
REQUIREMENT
FULFILLED
Pedestrian volume crossing the major street is 100 or more
for each of any four hours or is 190 or more during any one
Yes ❑ No r
hour; A
There are less than 60 gaps per hour in the major street'traf-
fic stream of adequate length for pedestrians to cross: AND
Yes ❑ No
The nearest traffic signal along the major street is greater
than 300 feet: AUQ
Yes No ❑ .
The new traffic signal will not seriously disrupt progressive
traffic flow on the major street.
Yes r No ❑
The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other
evidence of the need for right-of-way assignment must be shown.
I
Traffic Manual
i
TRAFFiC.SIGNALS AND LIGJVNG
9-7
:-t99:E
Figure 9-2
TRAFFIC SIGNAL
WARRANTS
WARRANT 4 -School Crossings Not Applicable_ _ _ _ _ _ _ _ _ _ ■
See School Crossings Warrant Sheet ❑
WARRANTS. Progressive Movement SATISFIED YES ■ NO ❑
MINIMUM REQUIREMENTS DISTANCE TO NEAREST SIGNAL FULFILLED
> 1000 FT. N - i n, S n, E 12 C ft, W) O ft. YES
�O — ■ No ❑
ON ONE WAY ISOLATED STREETS OR STREETS WITH ONE WAY TRAFFIC SIGNIFICANCE AND ADJACENT
SIGNALS ARE SO FAR APART THAT NECESSARY PLATOONING 8 SPEED CONTROL WOULD BE LOST
ON 2-WAY STREETS WHERE ADJACENT SIGNALS. DO NOT PROVIDE NECESSARY PLATOONING AND
SPEED CONTROL PROPOSED SIGNALS COULD CONSTITUTE A PROGRESSIVE SIGNAL SYSTEM ■ ❑
WARRANT 6 - Accident Experience SATISFIED YES ❑ NO ■
REQUIREMENTS WARRANT � FULFILLED
_ ONE WARRANT WARRANT 1 - MINIMUM VEHICULAR VOLUME
SATISFIED-------__i- --,-
---- ------- - - - - --
° OR WARRANT 2 - INTERRUPTION OF CONTINUOUS TRAFFIC_
-
V YES ■ NO ❑
SIGNAL WILL NOT SERIOUSLY DISRUUPT PROGRESSIVE TRAFFIC FLOW
® ❑
ADEQUATE TRIAL OF LESS RESTRICTIVE REMEDIES HAS FAILED TO REDUCE ACCIDENT FREQUENCY
■ ❑
ACC. WITHIN A 12 MONTH PERIOD SUSCEPTIBLE OF CORR. & INVOLVING INJURY OR >_ $500 DAMAGE
MINIMUM REQUIREMENT NUMBER OF ACCIDENTS
5ORMORE Z R1 {tit AK'Ies
❑ ■
WARRANT 7. Systems Warrant
SATISFIED
YES ❑ NO
MINIMUM VOLUME
REQUIREMENT ENTERING VOLUMES- ALL APPROACHES
FULFILLED
DURING TYPICAL WEEKDAY PEAK HOUR' 3 G D o VEH/HR
1000VEWHR --------------- --
OR-----------------
-
DURING EACH OF ANY S HRS. OF A SAT. AND/OR SUN. VEH/HR
YES r NO ❑
CHARACTERISTICS OF MAJOR' ROUTES MAJOR ST. MINOR ST.
HWY. SYSTEM SERVING AS PRINCIPLE NETWORK FOR THROUGH TRAFFIC
-- - - - - - - - - - --
__ __ _Yes _ _l_�o__
RURAL OR SUBURBAN HWY OUTSIDE OF, ENTERING, OR TRAVERSING A.CITY
�_e s_
APPEARS AS MAJOR ROUTE ON AN OFFIC_ — — — — — — _ — _N d_
IAL PLAN — —
—
es
ANY MAJOR ROUTE CHARACTERISTICS MET, BOTH STREETS
❑ ■
The satisfaction of a warrant is not necessarily justification fora signal. Delay, congestion,
evidence of the need for right-of-way assigmmnent must be shown.
contusion or other
f
'
9-8 I T FIC SIGNALS AND LIGHTING
1-1991
Figure 9-3
TRAFFIC SIGNAL WARRANTS
WARRANT 8 - Combination of Warrants
Traffic Manual
SATISFIED YES ❑ NO
REQUIREMENT
WARRANT
./
FULFILLED
TWO WARRANTS
SATISFIED
1. MINIMUM VEHICULAR VOLUME
YES ❑ NO
2. INTERRUPTION OF CONTINUOUS TRAFFIC
WARRANT 9 - Four Hour Volume
SATISFIED* YES ❑ NO ❑
O�
our
Approach Lanes One more 047
-se
Both Approaches - Major Street%li >
00
N
✓1�312
SroqJ373
35SJ
Highest Approaches - Minor StreetA4< 80
62 1 78.
, 61 1,
66
* Refer to Figure 9-6 (URBAN AREAS) or Figure 9-7 (RURAL AREAS) to determine if this warrant is satisfied.
WARRANT 10 - Peak.Hour Delay SATISFIED YES
❑ NO
(ALL PARTS MUST BE SATISFIED)
1. The total delay experienced for traffic on one minor street approach controlled by a
STOP sign equals or exceeds four vehicle -hours for a one -lane approach and five
vehicle -hours for a two-lane approach; ANDYES
❑ NO
2. The volume on the same minor street approach equals or exceeds 100 vph for
one moving lane of traffic or 150 vph for two moving lanes; AND YES
❑ NO
3. The total entering volume serviced during the hour equals or exceeds 800 vph
for intersections with four or more approaches or 650 vph for intersections with
three approaches.
- YES
NO ❑
WARRANT 11 -Peak Hour Volume
Annroach I antic
2 or
Clno mnrn
SATISFIED* YES ❑ NO
Ad 0 1 nof "of A0ur
Both Approaches . Major Streethi` ;P,- 1300
II
56q
70 3358
Highest Approaches Minor Street II< loo
ZN
J/ 1162178
1 5i . 661
* Refer to Figure 9-8 (URBAN AREAS) or Figure 9-9 (RURAL AREAS) to determine 'if this warrant is satisfied.
The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence
of the need for right-of-way assignment must be shown.
■
0
TYPE
NO.
INJURIES
RA
1
0
RE
1
0
IT
2
2
ROR
2
0
SS
0
0
TOTAL
6
2
WAD AND WESTPOR`l' q;L'?EE`1'
PERIOD FROM JANUARY 96 TO NOVEMBER 96 LEGEND
C -, CLEAR
CL - CLOUDY
D - DRY .
W - WET
R - RAINING
NO. INJURY ACCIDENT 2 JE�Zl . J 0 - OTHER
NO. P.D.O ACCIDENT 4
03-12-M DAYLIGHT
R, 8
TOTALSTATE
DRY SURFACE 9402-20-98-DAYLIGHT 01-02-98
- - os31 R. 1r - 17i5
DBT SURFACE 8 1
•� 04-22-98
1 48
y D c_ ntcrrt / '� toiz� 9e o s A
DARE 29 7 DA - EMT
TOTAL LOO C, D .
t111
a
PRO
TOTAL
l00
TIME - OT E STATE x
8A A.M. PEAK (7-M) . 4
P.M. PEAK-(4-OPM) p
LUNCH PERIOD (IIAM-IPM) e
OTHER TIMES pl
TOTAL (DO
TYPE
TYPE
N0.
INJURIES
RA
1
0
RE
0'
o
LT
2
2
ROR
o
o'.
SS
o
0
TOTAL,
3
z
. o
AUT a .
• MMM ACMENT
o rsorrm DAYACE ony
. W ® room osma
ROAD AND WES`1'POR`I' SIRE.
PERIOD FROM JANUARY 95 TO.DECEbIBER 95
NO. INJURY ACCIDENT ]E=;-, FL. <::> A
NO. P.D.O ACCIDENT 2
TOTAL
z An
DRY SURFACE
84
. 11BT SURFACE
-
a'
'
TOTAL
100
DAYLIGHT
Be
DUSK
xa
BA
A.M. PEAK (7-M)
p.w. PEAK ({-ePw).
LUNCH PERIOD (Il
oTIl6R TDiE9
TOTAL
LEGEND
C -CLEAR
CL -CLOUDY.
D - DRY
fl -WET
R -RAINING
0 -OTHER
.2
'• i CA DSGIIT
1307 c. D o A
- 8-05 ci
0795
c
TOTAI
Aw
x SPATE x
4 AUl
-Ipm) 8 -
81
l00
A
TYPE
N0.
INJURIES
RA
1
z
RE
4
3
IT
t
4
ROR
0
0
SS
0
0
TOTAL
e
p
N0. INJURY ACCIDENT 4
N0. P.D.O ACCIDENT z
TOT
X
ATE
DRY SMACK
p/
SET SURFACE
8
TOTAL,
100
HT
as
3
MDARK
2D.
TAL
100
' TIME
A.M. PEAK (7-BAM)
P.Y. PEAR (4-ePN)
LUNCH PERIOD (IIA1
OTHER TIMES
TOTAL.
C-'
a
0
a
te� [[
C� . . IlUm A[CIOLNT
O rR01'LIIiT DAIUOL ONLY
W ® FWD Op1ECi
ROAD AND WES`I'I'UIZ`1'
ROAD AND WES`I'I'UIZ`1'
S`1'IZEE`1'
PERIOD FROM JANUARY 99 TO DECF,MDER 94
LEGEND
C -CLEAR
•
Cl. - CLOUDY
D -DRY
fl - WET
R -RAINING
D
0 -OTHER
- DAYLICiIi 10-2e-94
� �
DAYLIGHT 2
07-09-93
C. D
C. D •'0732—
� DAYUCM , _ 04-11-93
0.
- C. D1700
d ��-fR
y 2007
c
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