California Violation Code 21457 – Fail to stop for flashing red

Definition of violation code 21457

Whenever an illuminated flashing red or yellow light is used in a traffic signal or with a traffic sign, it shall require obedience by drivers as follows:
(a) Flashing red (stop signal): When a red lens is illuminated with rapid intermittent flashes, a driver shall stop at a clearly
marked limit line, but if none, before entering the crosswalk on the near side of the intersection, or if none, then at the point
nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway before entering it, and the driver may proceed subject to the rules applicable after making a stop at a stop sign.
(b) Flashing yellow (caution signal): When a yellow lens is illuminated with rapid intermittent flashes, a driver may
proceed through the intersection or past the signal only with caution.