The Metropolitan Transportation Commission (MTC) has granted funds to the City of Oakley to synchronize five intersections in the FY 2015‐2016 cycle of the Program for Arterial System Synchronization (PASS). This project included installation of GPS clocks to synchronize the signals at high peak periods of the day. Signal timing was reviewed and optimized to handle the traffic volumes during four peak traffic periods: morning peak, midday peak, school release peak, and afternoon peak. Pedestrian crossing time was also evaluated to meet the most current Manual on Uniform Traffic Control Devices Standards.
The City was successful in obtaining the second phase of this grant and was selected for 11 more intersections along Main Street and Empire Avenue. With the completion of the second phase of this project for FY 2016‐2017, all signals along the Main Street and Empire Avenue will be synchronized to move traffic more efficiently during high demand.
Mayor Romick stated, “We are glad to have received funding from MTC to accomplish this project, which will allow for improved traffic flow through town. For our residents this ultimately means a better travel experience, as you travel further in less time by reducing stops.” The goal of the project was to conduct a timing analysis, develop, and implement signal coordination plans during weekday AM, midday, school PM, and PM peak periods.
GPS SiGnal CommuniCationS To provide a common time-source and enable communication between the signals, five GPS clocks were installed as a part of the project. These GPS clocks enable the signal controllers to regularly synchronize their clocks, efficiently deploy the timing plans at the same time, and thus help maintain the efficiency of signal coordination.
Benefits to Pedestrians: The Walk timing and Flash Don’t Walk clearance-timing parameters were reviewed and updated where required at the five intersections to provide adequate time for children and seniors to safely cross the study intersections to accommodate the new walking speed of 3.5 feet/second, as specified in the 2014 California MUTCD standards.
Benefits to traffic safety: The yellow clearance timing parameters were reviewed and updated where required based on posted speed limits along the study corridors at the five project intersections and no changes were made to all red clearance-timing parameters.