Why the Walk Light is So Short & the Flashing Don't Walk Light is So Long
The flashing "Don't Walk" signal for pedestrians is similar to a yellow light for vehicles. If a person has begun to finish crossing a street and the flashing light appears, they will have time to cross the street. If the flashing "Don't Walk" signal appears and a person has not started to cross the street, they should wait for the next "Walk".
At some intersections, the "Walk" signal will not appear unless the pedestrian push-button is pushed.
At some intersections, there is not a pedestrian push button because the "Walk" signal will automatically appear with the associated vehicle green light.