(a) General rule.--Whenever a flashing red or yellow signal is used in a traffic signal or with a traffic sign it shall require obedience by vehicular traffic as follows: (1) Flashing red.--When a red lens is illuminated with rapid intermittent flashes, drivers of vehicles shall stop in the same manner as at a stop sign, and the right to proceed shall be subject to the rules applicable after making a stop at a stop sign as provided in section 3323 (relating to stop signs and yield signs). (2) Flashing yellow.--When a yellow lens is illuminated with rapid intermittent flashes, drivers of vehicles may proceed through the intersection or past such signal only with caution. (b) Railroad grade crossings.--This section does not apply at railroad grade crossings. Conduct of drivers of vehicles approaching railroad grade crossings shall be governed by the rules as set forth in section 3341 (relating to obedience to signal indicating approach of train). Cross References. Section 3114 is referred to in sections 1535, 3116, 3117, 3326, 3327 of this title.
Pennsylvania Legal Code