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Moorpark City Councif�'
Agenda Report
TO: The Honorable City Council
FROM: Kenneth C. Gilbert, Director of Public Works
DATE: May 9, 2003 (Council Meeting 5- 21 -03)
SUBJECT: Traffic Signal Coordination on Tierra Rejada Road
BACKGROUND
At the City Council meeting of April 16, the City Council asked
that an item be placed on a future Agenda pertaining to the
possible coordination of the traffic signals on Tierra Rejada Road
between the freeway and Spring Road.
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A. Tierra Rejada Road Traffic Siqnal Interconnect Project
Project 8036 provides for the construction of a traffic signal
interconnect system along Tierra Rejada Road between the Route
23 freeway and Gabbert Road. The design for that project is 95%
complete. Staff is working with Caltrans on obtaining permits
and on seeking approval of grant [Congestion Mitigation Air
Quality (CMAQ)] funding for the project. It is anticipated that
the project will be ready to advertise for bids within three
(3) months and that the construction of the project should be
completed within one (1) year.
Staff is also simultaneously working on a similar project for
the construction of a traffic signal interconnect system for
Los Angeles Avenue. These two signal interconnect projects will
be bid and constructed as one project.
B. Interim Option
At the April 16 meeting, it was recognized that the above
project was pending, but interest was expressed in determining
whether or not any interim measures could be taken to improve
traffic flow east of Spring Road.
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Traffic Signal Coordination: Tierra Rejada Road
May 9, 2003
Page 2
Staff has investigated the matter and offers the following
findings:
• The traffic signal timing necessary to provide for the
"platooning" of traffic on Tierra Rejada Road, has already
been completed. The problem is that it would be difficult to
impossible to maintain this "relative" timing system, without
the planned "hard- wired" interconnect system.
• New technology is available which allows for the installation
of synchronized clocks in the controllers in question, which
would enable the controllers to operate independently yet
remain synchronized. This system is not as "fool- proof" as a
"hard- wired" system, but it will work.
• The cost (design, procurement, installation and calibration)
for such a system for the signal between Spring Road and the
freeway, is estimated to be between $6,000 and $10,000.
C. Cost / Benefit
In assessing the relative cost - benefit of proceeding with the
above described interim improvements, one should consider the
following:
• the useful life of the system [one year];
• the cost of the project [$6,000 - $10,000); and
• the staff time required to be diverted from other projects to
develop and implement this interim project [undetermined].
D. Budget
If the subject project is approved, staff will bring back to
Council at a future date, a Resolution amending the Budget to
fund this project.
E. Alternative Action
In lieu of the interim project described above, the revised
coordinated signal timing could be installed, without
synchronized clocks, and monitored for effectiveness. That
timing would be designed to favor the east -west traffic flow.
STAFF RECOMMENDATION
It is recommended that Staff be directed to undertake the efforts
described in Section E of this report.
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