HomeMy WebLinkAboutNB 8 TRAFFIC SIG INVEST 04-7-80DATE: APRIL 1, 1980
NEW BUSINESS
NO. 8
- '4-7?.80
-Corn
TO:
DAN BLANKENSHIP, CITY ADMINISTRATOR
FROM: NORMAN HOWER, TRAFFIC ENGINEER
SUBJECT: TRAFFIC SIGNAL INVESTIGATION AT WALNUT AVENUE AND FRANKLIN AVENUE
A traffic signal investigation has been conducted at the intersection of Walnut
Avenue and Franklin Avenue in the Irvine Industrial Complex as requested in the
attached letter from the Linwilco Laboratories at 2832 Dow Avenue.
This intersection is in approximately the center of the complex and handles not
only through traffic, but also traffic circulating within the center itself and
has a high afternoon-evening peak period corresponding to the release of workers
from the local industries.
Walnut Avenue is a Primary Arterial on the Arterial Highway System and the inter-
section with Franklin is fully improved. Visibility is very good in all directions.
Walnut is speed zoned for 45 MPH with Franklin zoned 40 MPH for southbound and 35
MPH for northbound. Franklin is now stopped for Walnut Avenue.
This intersection has met the State Traffic Signal Warrants for Minimum Vehicular
Volume (Warrant 1) and Accident Experience (Warrant 6). The intersection had 7
accidents in the 12 months between April 1, t979 and March 31, 1980 that could
possibly be corrected by signals (right angle accidents). Most of these accidents
occurred in off-peak peiods and usually the comment of the driver on Franklin was
that the vehicle on Walnut was not seen even though visibility is very good.
Observation of the intersection during the evening peak has shown difficulty in
entering onto Walnut from Franklin with considerable backup resulting on Franklin
at times.
At the time Walnut Avenue is opened beyond Myford Road it is anticipated that
there will be an increase in traffic on Walnut with a possible slight decrease
for southbound Franklin. But, in all proba~lity, the peak period problem and
accident problem will remain the same or increase.
The decrease would result from through tPaffic that now takes the Franklin-Michelle-
old Myford route transferring to Walnut. It is anticipated that there will be an
increase in traffic in the future on all approaches to this intersection.
It is recommended that traffic signals be installed at the Walnut Avenue and
Franklin Avenue intersection and be included in the 1980-81 budget. Estimated
cost of installation would be approximately $55,000. This signal would be inter-
connected with the future signals at the Walnut-Jamboree and Walnut-Myford inter-
sections. Attached are Signal Warrants, Intersection Volumes and Letter of Request.
Norman Hower
Traffic Engineer
· rv
~. ~ac~ments J
2832 DOW AVENUE · TUSTIN, CALIFORNIA 92680 . AREA CODE 714/832-9700
March 21, 1980
Bob Ledindecker
City Engineer
300 Centenial Way
Tustin, Ca. 92680
Dear Hr. Ledindecker,
Before a serious accident occurs, please install an
electric s~gnal at the intersection of Walnut and
Franklin.
Traffic has increased so much in the past year, due
to the expansion of the Tustin-Irvine Industrial
Complex, that numerous close calls have taken place.
This intersection is a definite hazard.
12-1979
TRAFFIC SIGNALS AND LIGHTING
Traffic Manual
Figure 9-1A
TRAFFIC SIGNAL WARRANTS
Major St: WALNUT AVENUE
Minor St: FRANKLIN AVENUE
CALC
CHK
N. HOWER
DATE 3/31/80
DATE
45 mph
35-40 mph
Critical Approach Speed
Critical Approach Speed
RURAL (R)
URBAN (U)
Critical speed of major street traffic_~ 40 mph .............
In built up area of isolated community of .: 10.000 pop.
WARRANT I -- Minimum Vehicular Volume
APPROACH
LANES
I~oth Apprch~.
Major Street
Highest Ap::)rcr~ 150
Minor Street ·
MiNiMUM REOUIREMENTS 10~4 SATISFIED Yes ~[] No []
mo~ show. ,. s.^cK[*s~ 8~.~ SATISFIED Yes ~ No D
U R U R O0 ~0 O0
0 0 0 ~ O0 0 0 O0
o .oo o
~ 3~ ~ 420
~oo~ ~zso~ ~.o~ :~s, 630 555 780 595 485 615 590 495
~o5 2~ ~ 155 245 265 175 185 380 375 340
(841 (160)
','~ARRANT 2 -- Interruption of Continuous Traffic
'~ot h App r c I',,~.
Ma jew Street .
H~ghest AF~rch
Minc~ Street '
UiNlUUM REQUIREMENTS 100% SATISFIED Yes [] NO []
I I , 8oDo%SA~IS~IEI~ ,Yes O No {~[]
u R u R ~o oo oo o~ oo oo oo oo
oo ~o/ .... /..~/oo~ o~ o/o o
7~ ~5 ~ ~
~o~ (~) ~zo~ (so~ 1070 630 555 780 595 6~5 590 495
75 ~* ~ 70
~o) ~42) mo) m6~ 105 155 245 265 175 380 375 345
· NOTE: Heavier of /ell' turn moveCnent from Majo~ Street included when L T-phasing is p, oposed
WARRANT 3 - Minimum Pedestrian Volume
Both Apprch~. NO Median
Major Street
Voh,xne Raised
,4' Media~
Pad's On Highest VolLa~e
X-Walk Xincj Mal~' Street
600 420
1000 700
150 105
10~/¢ SATISFIED Yes [~ No []
80~ SATISFIED Yes [] No I~
II!i111
WARRANT 4 -- School Crossings
Not Applicable I~
See School Crossings Warrant Sheet r'l
T$-tOA
Traffic Manual
TRAFFIC SIGNALS AND LIGHTING
Figure 9:1B
TRAFFIC SIGNAL WARRANTS
WARRANT 5 -- Progressive Movement
Satisfied Yes [] No []
MINIMUM REQUIREMENTS DISTANCE TO NEAREST SIGNAL FULFILLED
· 1000 It N --- , S --- ft, E --- ~ft, W 5600 ft YES~ NO ['~
ON ISOLATED ONE WAY ST OR ST. WITH ONE WAY TRAFFIC SIGNIFICANCE ADJACENT SIGNALS
WARRANT 6 -- Accident Experience
Satisfied Yes []
-- -- ~ ............................
No []
\ FULFILLED
X
YES [] NO []
[] []
WARRANT 7 -- Systems Warrant
Satisfied Yes []
CHARACTERISTICS OF MAJOR ROUTES MAJOR ST MtNO~ ST
NO []
¥
YESES1 NO []
WARRANT 8 -- Combination of Warrants
fu~e~ It no o~a wa??ant set,stied 100%) Satisfied
Yes I-1 No I-1
FULFILLED
YESr'~ NO []
12-19~9
The satisfaction of a warrant is not necessarily justification for signals. Delay.
congestion. Confusion or other evidence of the need for right o! way assignment
must be shown.
INTERSECTION VOLUMES
WALNUT AVENUE & FRANKLIN AVENUE
] :00- 1:00 AM
~:00- 2:00
2:00- 3:00
:00- 4:00
4:00- 5:00
:00- 6:00
-=:00- 7:00
7:00- 8:00
;:00- 9:00
9:00-10:00
:O0-11:O0
~.:'~-12:00
22:00- 1:00 PS~
.:SO- 2:00
2:00- 3:00
3:00- 4:00
--~:00- 5:00
5:00- 6:00
3:00- 7:00
7:00- 8:00
5:00- 9:00
--9:00-10:00
!0:00-11:00
1:00-12:00
1
EoB.
WALNUT
15
5
0
5
15
95
740
960
470
245
220
315
5OO
435
325
325
230
175
105
9O
70
55
45
35
5475
WoBo
WALNUT
30
10
10
0
0
2O
50
110
160
140
120
240
28O
160
160
290
360
320
140
7O
3O
50
20
3O
2800
TOTAL N.B. S.B.
WALNUT FRANKLIN FRANKLIN
45 0 60
15 0 10
10 0 10
5 0 5
15 0 0
115 0 5
790 25 65
1070 50 105
630 60 155
385 110 120
340 120 115
555 215 245
780 265 245
595 175 160
485 185 135
615 185 380
590 315 375
495 205 340
245 80 130
160 45 60
100 10 45
105 15 25
65 10 40
65 5 40
8275 2075 2870
INTERSECTIO~
TOTAL FRANKLIN TOTAL
60 105
10 25
10 20
5 10
0 15
5 120
90 880
155 1225
215 845
230 615
235 575
460 1015
510 1290
335 930
320 805
565 1180
690 1280
545 1040
210 455
105 265
55 155
40 145
50 115
45 110
4945 13220