Signal Phase and Timing (SPaT)

Signal Phase and Timing (SPaT) refers to the information communicated by traffic signals about their current status and upcoming changes. It includes details like which lights are active (red, yellow, green), how long they will stay on, and when the signal will change. This information helps drivers, cyclists, and connected vehicles make safer and more efficient decisions at intersections, reducing stop-and-go traffic and improving overall traffic flow. SPaT data is often shared through digital systems to enable smarter traffic management and support autonomous vehicle navigation.