What is the purpose of "passage time" in traffic signal operation?

The purpose of "passage time" in traffic signal operation is specifically to accommodate the average time that vehicles take to traverse the intersection. This term refers to the time allocated within a signal cycle for vehicles to clear the intersection once the light has changed.

Understanding passage time is crucial for ensuring smooth traffic flow. It takes into account various factors, such as the speed of vehicles, the geometry of the intersection, and typical traffic conditions. By effectively managing this time, traffic signal systems can minimize congestion and reduce the likelihood of collisions, particularly as vehicles move through or enter the intersection.

This consideration is not just about when the signal turns green or red; it's about ensuring that cars can safely and efficiently navigate through the intersection without undue delays or risks. Accurate passage time calculations enhance the overall effectiveness of traffic signals, contributing to improved safety and efficiency for all road users.