Signal Timing Plans

One of the biggest components of the response plans are the signal timing plans for the reroutes. The signal timing plans allow for traffic managers to adjust capacity along the reroute to make it attractive for travelers. A significant amount of time has been spent working with stakeholders and modeling the response plans to ensure their effectiveness. The PATH team also respected the stakeholder constraints when developing the signal timing plans.

Following the creation of the reroutes, the PATH team used SYNCHRO to develop signal timing plans for each reroute. Currently, there are a total of 70 reroutes covering 139 unique intersections in the I-210 corridor. Various cycle lengths were tested including 105, 120, 135, and 150 seconds. The Aimsun model was used to confirm that the signal plans worked as expected. When considering all of the cycle options, about 600 unique signal timing plans have been developed and evaluated.

As of July 2019, stakeholders have begun to review the signal timing plans. The city of Pasadena has begun installing many of their plans onto their controllers in the field. The city of Arcadia and LA County intend to perform bench tests of the plans in their respective TMCs. These bench tests enable stakeholders to verify there are no coding errors and also to check system communications. Specifics of field testing procedures are under discussion.