California Vehicle Code Section 21453 – Obeying Traffic Devices
21453 a CVC
(a) A driver facing a steady circular red signal alone shall stop at a marked limit line, but if none, before entering the crosswalk on the near side of the intersection or, if none, then before entering the intersection, and shall remain stopped until an indication to proceed is shown, except as provided in subdivision (b).
21453 b CVC
(b) Except when a sign is in place prohibiting a turn, a driver, after stopping as required by subdivision (a), facing a steady circular red signal, may turn right, or turn left from a one-way street onto a one-way street. A driver making that turn shall yield the right-of-way to pedestrians lawfully within an adjacent crosswalk and to any vehicle that has approached or is approaching so closely as to constitute an immediate hazard to the driver, and shall continue to yield the right-of-way to that vehicle until the driver can proceed with reasonable safety.
21453 c CVC
(c) A driver facing a steady red arrow signal shall not enter the intersection to make the movement indicated by the arrow and, unless entering the intersection to make a movement permitted by another signal, 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 before entering the intersection, and shall remain stopped until an indication permitting movement is shown.
21453 d CVC
(d) Unless otherwise directed by a pedestrian control signal as provided in Section 21456, a pedestrian facing a steady circular red or red arrow signal shall not enter the roadway.
California Vehicle Code Section 21455 – Traffic Signals Not at an Intersection
If an official traffic control signal is erected and maintained at a place other than an intersection, including a freeway or highway on ramp, this article applies, except those provisions that by their nature can have no application. A stop required shall be made at a sign, crosswalk, or limit line indicating where the stop shall be made, but, in the absence of that sign or marking, the stop shall be made at the signal.
California Vehicle Code Section 21455.5 – Passing the Limit Line
The limit line, the intersection, or a place designated in Section 21455, where a driver is required to stop, may be equipped with an automated traffic enforcement system if the governmental agency utilizing the system locates the system at an intersection and ensures that the system meets the criteria specified in Section 21455.7. Learn more about red light camera tickets.
California Vehicle Code Section 21457 – Flashing Red Lights (or Yellow)
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.