For signals with pedestrian requirements, what is primarily adjusted concerning timing?

In traffic signal systems that incorporate pedestrian requirements, the walk signal duration is primarily adjusted to ensure that pedestrians have sufficient time to safely cross the street. This duration must account for the average walking speed of pedestrians, as well as any variations based on age, mobility, and environmental conditions.

Setting an adequate walk signal duration allows pedestrians who are waiting at the crosswalk to have enough time to initiate crossing when the signal changes to "walk." It is essential for enhancing safety and accessibility for all pedestrian users.

While factors such as maximum cycle time, initial green phase, and minimum yellow time are important components of the traffic signal operation, they focus more on vehicle flow and safety. Adjusting the walk signal duration directly addresses the needs of pedestrians, making it crucial in signals where pedestrian activity is part of the traffic flow considerations.