Whenever an illuminated flashing red or yellow signal is used in a traffic sign or signal, it shall require obedience by vehicular traffic as follows.
(A) When a red lens is illuminated with rapid intermittent flashes, drivers of vehicles shall stop at a clearly-marked stop line, but if there is no such line then before entering the crosswalk on the near side of the intersection or, if there is no crosswalk, then at the point nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway before entering the intersection, and the right to proceed shall be subject to the rules applicable after making a stop at a stop sign.
(B) 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 “and in accordance with regulatory sign(s)”.
(2005 Code, § 5-222)