I'm not convinced pedestrians crossing at a Don't Walk have the right of way in PA as they do in CA.
PA law:
3113. Pedestrian-control signals.
(a) General rule.--Whenever special pedestrian-control signals exhibiting words or symbols are in place, the signals shall indicate as follows:
(1) Word "Walk" or walking person symbol.--Pedestrians facing the signal should proceed across the roadway in the direction of the signal and shall be given the right-of-way by the drivers of all vehicles.
(2) Phrase "Don't Walk" or upraised hand symbol.--Pedestrians should not start to cross the roadway in the direction of the signal, but any pedestrian who has partially completed his crossing on the "Walk" signal should proceed to a sidewalk or safety zone while the "Don't Walk" signal is showing.
(3) Flashing "Walk".--Pedestrians facing the signal are cautioned that there is possible hazard from turning vehicles, but pedestrians may proceed across the roadway in the direction of the signal and shall be given the right-of-way by the drivers of all vehicles.
(4) Flashing "Don't Walk" Signal.--Pedestrians should not start to cross the roadway in the direction of the signal, but any pedestrian who has partly completed crossing during the "Walk" signal should proceed to a sidewalk or safety zone, and all drivers of vehicles shall yield to the pedestrian.
3542. Right-of-way of pedestrians in crosswalks.
(a) General rule.--When traffic-control signals are not in place or not in operation, the driver of a vehicle shall yield the right-of-way to a pedestrian crossing the roadway within any marked crosswalk or within any unmarked crosswalk at an intersection.
CA law:
Right-of-Way at Crosswalks
21950. (a) The driver of a vehicle shall yield the right-of-way to a pedestrian crossing the roadway within any marked crosswalk or within any unmarked crosswalk at an intersection, except as otherwise provided in this chapter.
(b) This section does not relieve a pedestrian from the duty of using due care for his or her safety. No pedestrian may suddenly leave a curb or other place of safety and walk or run into the path of a vehicle that is so close as to constitute an immediate hazard. No pedestrian may unnecessarily stop or delay traffic while in a marked or unmarked crosswalk.
(c) The driver of a vehicle approaching a pedestrian within any marked or unmarked crosswalk shall exercise all due care and shall reduce the speed of the vehicle or take any other action relating to the operation of the vehicle as necessary to safeguard the safety of the pedestrian.
(d) Subdivision (b) does not relieve a driver of a vehicle from the duty of exercising due care for the safety of any pedestrian within any marked crosswalk or within any unmarked crosswalk at an intersection.
So PA says pedestrians have the right of way at a signaled intersection when they have a Walk signal, while CA doesn't have that limitation, as far as I can tell. (21950(b) restricts what pedestrians can do in various ways, but doesn't restrict their right of way.)