Hello and Welcome to the new Traffic Signal Portal.
This portal was developed as a resource tool for all information regarding traffic signals in Pennsylvania.
Traffic Adaptive Systems provide traffic signal timing that efficiently changes based on traffic conditions and maximizes the traffic flow. Traffic Adaptive Systems are different from Traffic Responsive Systems (also known as Closed Loop Systems) because they do not rely on previously determined traffic timing thresholds. Traffic Adaptive Systems typically have detectors that gather traffic information and use of algorithms to logically adjust the signal timing based upon the current traffic demand. Traffic Adaptive Systems provides the Department with opportunities to begin to use technology to effectively manage key traffic signal corridors.