At all locations in the borough where official traffic-control signals are installed, pedestrians shall obey the directions of those traffic-control signals, as follows:
(1) When facing a green signal, a pedestrian may proceed across the roadway within a crosswalk;
(2) When facing a steady yellow signal, a pedestrian shall not start to cross the roadway; and
(3) When facing a steady red signal, a pedestrian shall not enter the roadway.
Penalty, see § 75.99