Whenever special pedestrian-control signals exhibiting the words “Wait” or “Don’t Walk” are in place, the signals shall indicate as follows:
   (A)   “Walk.”  Pedestrians facing the signal may proceed across the roadway in the direction of the signal and shall be given the right-of-way by drivers of all vehicles.
   (B)   “Wait” or “Don’t Walk.”  No pedestrians shall start to cross the roadway in the direction of the signal, but any pedestrian who has partially completed his or her crossing when the walk signal shall proceed to a sidewalk or safety island while the wait signal is showing.
(47 O.S. § 11-203)  (`90 Code, § 20-25)