Adaptive Traffic Control

About Adaptive Traffic Control


An Adaptive Traffic Control System (ATCS) adjusts, in real time, signal timings based on the current traffic conditions, demand, and system capacity. A broad definition of ATCS includes all major ATCSs that may vary significantly in their levels of responsiveness, algorithmic framework, and detection. However, an ATCS definition excludes any traffic-responsive pattern selection systems and traffic-actuated (free or coordinated) types of traffic control. An ATCS usually includes algorithms that adjust a signal’s cycle, offset, splits and sometimes phase sequence to minimize delays and reduce the number of stops. These systems require extensive surveillance, historically in the form of inductive loop detectors of video systems, and communication infrastructure that enables connection either among local controllers or between central system and the local controllers.

Map of ATCSs in US

The map displayed below shows locations and number of intersections controlled by the Adaptive Traffic Control Systems currently deployed in the United States. Information about ATCSs is obtained from other websites and/or from personal communication with the ATCS vendors. LATOM is not responsible for any misrepresentations of the ATCS deployments that may result from removal/modification of some of the systems. LATOM tries to update the ATCS map at least twice a year. We welcome comments and suggestions to improve accuracy and appearance of the map.

View Adaptive Traffic Control Systems in US in a larger map