ABSTRACT
Active transportation and demand management (ATDM) is the dynamic management, control, and influence of travel demand, traffic demand, and facility demand on the entire transportation system and over a traveler's entire trip. Using real-time and archived data along with predictive methods, ATDM supports real-time actions that achieve or maintain traffic flow and influence traveler behavior to prevent or delay breakdown conditions, improve safety, promote sustainable travel modes, reduce emissions, or maximize system efficiency. Sensors are utilized in interconnected intersection control to gather traffic flow data for signal timing plan selection, critical intersection control, and other traffic adaptive control algorithms. Actuated control requires sensors to provide data to a local traffic signal controller. Sensor data similarly support vehicle classification, tolling operations, traffic surveys, parking facility management, and roadway hazard identification. Although not strictly a traffic flow sensor application, red-light running cameras are found at many intersections where signal control exists.
