The Public Works Traffic Engineering Division is responsible for programming approximately 284 traffic signals in the City of Stockton. View the map of the City's Traffic Management System Fiber Optic Network.
The City has two types of traffic signals: fixed-time signals and traffic actuated signals. Fixed-time signals are set for average conditions and change at predetermined time intervals. Traffic actuated signals detect vehicles, including bicycles, and adjust the timing to optimize traffic flow at the intersection.
Along major streets, with several traffic signals spaced at periodic intervals, the traffic signals are synchronized to provide coordinated movement along the major street.
Before installing a traffic signal at an intersection, established minimum criteria, called "warrants," must be satisfied. The engineering review includes an examination of:
If a traffic signal is dark, where all lights are out, a red light is out, the signal is in red flash, or the pedestrian crossing lights are out, it is an emergency situation and should be reported immediately to the Municipal Service Center.
The Traffic Signal Management Center provides constant communication with computerized controllers at each traffic signal via a citywide fiber optic network. Signal status and equipment malfunctions are reported every second. Traffic volumes are reported every few minutes. The central computers then select the best coordinated timing pattern and transmit updated instructions to the signal controllers on the street.
The City operates over 200 cameras which provide important information to signal operators and maintenance staff, allowing them to observe and fine-tune intersection operations in real time. Staff can assess each situation and make corrective adjustments immediately without having to travel to the site.
There are currently no external links.
This City of Stockton webpage last reviewed on --- 5/16/2011