HomeMy WebLinkAboutRPT 3 TRAFFIC SIG TIMNG 01-4-82TO: WILLIAM HUSTCN, CITY MANAGER
FROM: BCB LEDENDECKER, DIRECTCR OF PUBLIC Wfl~KS/CITY ENGINEER
SEV~qTEENZ~6/YCRBA - ENDERLE C~'r~R DR.
At a previous City Council meeting in December, 1981, two public concerns were
made regarding the timing of the pedestrian phase across Newport Ave. at Bryan
Ave. and the north-south vehicular phase across Seventeenth St. at Yorba St.-
Enderle Center Dr.
NEWPCRT AVENUE AT BR~AN AVENUE
The pedestrian phase across Newport Avenue is presently timed for 28 seconds.
This 28 seconds consists of 8 seconds of green walk time and 20 seconds of
flashing red "Don't Walk". In addition, there is 3.5 seconds of amber time on the
east-west Bryan Ave. phase.
The width of Newport Avenue is 84 feet curb to curb. However, in the vicinity of
the crosswalks at the curb returns, the width is 94 feet. The normal walking rate
of the average individual is 4 feet ~er second and would require about 23.5
seconds to clear the roadway width of Newport Ave. The present timing (28
seconds) requires an individual to walk at the rate of 3.4 feet per second to
clear the roadway if the full 28 seconds is utilized.
Adequate time for an individual in a walker to cross Newport Ave. might range from
50 seconds to 80 seconds or longer. It would be very difficult to select a time
to cover all individuals utilizing walkers, canes, etc.
Any time added to the pedestrian phases of either Newport or Bryan Avenues would
diminish the ~nount of green time for either street and would start to impact the
traffic flows. Any change of pedestrian timing at this traffic signal could
possibly require a change at other intersections if it ware so requested. This
type of change could have a negative i~pact on traffic flows on streets, such as
Red Hill Ave., Irvine Blvd. and Seventeenth St.
Staff would rec~,uL~nd no change of the timing of the pedestrian phase of this
signal.
S~ ST. AT YCRBA ST. - ~qDERLE C~qTER DR.
The traffic signal at this intersection is a fully traffic actuated system with
the right of way resting on Seventeenth St. Under the present operation, the
green phase for Yorba St. - Enderle Center Dr. will termiDmte 2 seconds after the
last vehicular actuation. Yorba St. - Enderle Center will have a green phase of 6
seconds minimum unless another call is received frc~ additional vehicles actuating
the detector loops. In the event any additional calls are received, the green
phase will extend to a maximum of 23 seconds.
TRAFFIC SIGNAL TIMING AT NE~PCRT/BR~AN AND
SEVENT~:ENTH/YCRBA - ~qDERLE CS~I',:R DR.
DECEMBER 3 0, 19 81
PAGE TWO
Traffic volumes carried on Seventeenth Street are approximately five times the
amount carried on Yorba St. - Enderle Center Drive. On this basis, it is felt the
Seventeenth Street phase must be favored with respect to time to provide the best
available traffic flows.
The intersection was reviewed twice a day for five days and was found to be
working adequately. All traffic within the loop detection areas was clearing the
intersection during both peak hour and off peak hour periods.
Staff would recommend no ~hange of signal timing at this intersection.
DIRECTOR CF PUBLIC WORKS/
CITY ENG/NEER
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