Whenever special pedestrian control signal exhibiting the words "Walk" or "Don't Walk" are in place such signal shall indicate as follows:
(A) Walk: Pedestrians facing such signal may proceed across the roadway in the direction of the signal and shall be given the right of way by the driver of all vehicles.
(B) Don't Walk: While the "don't walk" signal is illuminated, either steady or flashing, no pedestrian shall start to cross the roadway in the direction of the signal, but any pedestrian who has partly completed his crossing during the "walk" indication shall proceed to sidewalk or safety island, if one is provided.