Why do non-pedestrian controlled crossings need the button pushed?

Question

There are plenty of intersections where a walk signal comes on automatically, why do some intersections require a button push to initiate the walk signal when it doesn’t seem to make a difference in light timing or duration?

In: Engineering

Answer 1

Colose to me is a crossroads that allows diagonal crossing too. The diagonal crossing is time dependent (rush hours). Don’t press button don’t get diagonal crossing.