How does IDOT evaluate the performance of traffic signals?

IDOT evaluates the performance of traffic signals primarily by conducting traffic signal timing studies and evaluations. This method involves analyzing traffic flow and the timing of signals to determine how effectively they manage vehicle and pedestrian movement at intersections. By carefully studying the timing of green, yellow, and red signals, as well as their coordination with neighboring signals, IDOT can identify areas for improvement, ensuring smoother traffic flow and enhancing safety.

This approach allows for data-driven decisions that can lead to adjustments in signal timing, potentially reducing congestion and minimizing wait times for all road users. Regular evaluations also help to adapt to changes in traffic patterns or volumes over time, ensuring that traffic signals remain effective as conditions evolve.