Transit Signal Priority (TSP) is an advanced traffic management system designed to provide special treatment and reduce dwell time for transit vehicles such as buses, rapid transit vehicles, railroad cars, water vehicles, municipal vehicles, law enforcement, and fire safety vehicles at signalized intersections. How Bus Signal Priority Works A TSP system requires specific hardware, including vehicle detectors and specialized traffic signal controllers. These components work together to prioritize transit vehicles at intersections, ensuring they spend less time waiting at red lights and more time moving efficiently through traffic by Bus Signal Priority.