Whenever pedestrian control signals exhibiting the words, numbers, or symbols meaning "Walk" or "Don't Walk" are in place such signals shall indicate and apply to pedestrians as follows:
Walk. --Pedestrians facing such signal may proceed across the highway in the direction of the signal and shall be given the right-of-way by the drivers of all vehicles.
Don't Walk. --No pedestrian shall start to cross the highway in the direction of such signal, but any pedestrian who has partially completed his crossing on the Walk signal shall proceed to a sidewalk or safety island and remain there while the Don't Walk signal is showing.