HomeMy WebLinkAboutNB 3 RVW EXISTING TIMNG 8-21-89i':~ ?~ ?=~ ~x !1 :~:~ ~ NEW BUSINESS
...... ." ".': ..' W 8-21-89
DATE: AUGUST 10, 1989 ~~~
TO: WILLIAM HUSTON, CITY MANAGER
FROM: PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
SUBOEOT: REVIEW OF EXISTING TIMING AT IRVINE BOULEVARD AND YORBA STREET
RECOMMENDATION:
Receive and file.
~ACKGROUND:
At a recent city council meeting, a concern was directed to staff
relative to the signal at Irvine Boulevard and Yorba Street.
Specifically, the concern centered on too much green time on Irvine and
not enough green time on Yorba.
DISCUSSION:
The subject intersection is a link in a chain of several synchronized
intersections along Irvine Boulevard - including the Irvine Boulevard
intersection at the SR-55 freeway on-ramp. Its operation is governed by
traffic signal coordination programs which, depending on the time of
day, will purposely delay side street traffic. During peak traffic
periods, it is not unusual for side street traffic to be delayed for
periods longer than normal. That is because the signal coordination
program is controlling the signal's green phases and necessarily will
give preferential green signal time to the highest traffic volume flow
(Irvine Boulevard).
Although a recent check of the intersection did not reveal a
malfunction, we nevertheless will perform an analytical evaluation of
the intersection operation. This will include a review of traffic
counts, the needs/operation of the state-controlled Irvine/SR-55 freeway
signal, and a review of the actual coordination programs for Irvine
Boulevard.
It is suggested that the council provide engineering staff with the time
of day that the occurrence was noted. With that information, a visual
examination at that time will be conducted to assist in our improvement
recommendation. If the complaint of long green time was at night, the
remedy most likely will be quite easy. However, if the problem was
noted during peak traffic hours, a more difficult solution (if any) will
be necessary.
Bob Ledendecke~ .
Director of Pdblic Works/City Engineer
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