Flashing lights are prohibited on vehicles except as otherwise permitted.

roadway, or when approaching, stopped at, or departing from, a railroad grade crossing, turn signal lamps may be flashed as warning lights if the front turn signal lamps at each side are being flashed simultaneously and the rear turn signal lamps at each side are being flashed simultaneously.

actually engaged in a funeral procession, if the front turn signal lamps at each side are being flashed simultaneously and the rear turn signal lamps at each side are being flashed simultaneously.

Any implement of husbandry displaying a slow moving vehicle emblem, as defined in Section 24615, and being operated at a speed of 25 miles per hour or less, may be equipped with double-faced amber turn signals which may be flashed simultaneously as warning lights.

Any motorcycle may be equipped with a means of modulating the upper beam of the headlamp between a high and a lower brightness at a rate of 200 to 280 flashes per minute. Such headlamps shall not be so modulated during darkness.

No civil liability shall attach to any person for the use or nonuse of turn signal lamps in the manner permitted by paragraph (3) or (5) of subdivision (a) of Section 25251, except for such civil liability as would attach for the use or nonuse of any other device required by this article or Article 8 (commencing with Section 25300).

Any motor vehicle may also be equipped with a theft alarm system which flashes any of the lights required or permitted on the motor vehicle and which operates as specified in Article 13 (commencing with Section 28085) of Chapter 5 of this division.

The lamps shall be mounted at the same height, with one lamp located on each side of the vertical centerline of the vehicle, not higher than the bottom of the rear window, or if the vehicle has no rear window, not higher than 60 inches. The light output from each of the lamps shall not exceed 200 candlepower at any angle horizontal or above. The amber lamps may be used either separately or in combination with another lamp.

Every authorized emergency vehicle shall be equipped with at least one steady burning red warning lamp visible from at least 1,000 feet to the front of the vehicle to be used as provided in this code.

In addition, authorized emergency vehicles may display revolving, flashing, or steady red warning lights to the front, sides or rear of the vehicles.

intensity as to reveal persons and vehicles at a distance of at least 350 feet ahead for all conditions of loading.

when the tow truck is towing a vehicle and moving at a speed slower than the normal flow of traffic.

An automobile dismantler’s tow vehicle used to tow a disabled vehicle may be equipped with flashing amber warning lamps.

A flashing amber warning lamp upon an automobile dismantler’s tow vehicle may be displayed to the rear when the automobile dismantler’s tow vehicle is towing a vehicle and moving at a speed slower than the normal flow of traffic.

Vehicles used by highway authorities or bridge and highway districts, and vehicles of duly authorized representatives thereof, used in highway maintenance, inspection, survey or construction work may display flashing amber warning lights to the front, sides or rear when such vehicles are parked or working on the highway.

1, 1993, shall also be equipped with an amber warning light system, in addition to the flashing red light signal system. Any schoolbus manufactured before July 1, 1993, may be equipped with an amber warning light system.

If a schoolbus is used for the transportation of persons of any age who are developmentally disabled, as defined by the Lanterman Developmental Disabilities Services Act (Division 4.5 (commencing with Section 4500) of the Welfare and Institutions Code), the amber light signal system, flashing red light signal system, and stop signal arm shall not be used other than as required by Sections 22112 and 22454.

To warn other motorists or pedestrians on a roadway during a backing maneuver, the operator of a schoolbus may flash turn signal lamps if the front turn signal lamps at each side are flashed simultaneously and the rear signal lamps at each side are flashed simultaneously.

shall be established by regulations adopted by the department by April 1, 1991. No schoolbus shall be equipped with a strobe light until the regulations are adopted.

officer’s duties, may, in addition, display a steady or flashing blue warning light visible from the front, sides, or rear of the vehicle.

for the purpose of controlling official traffic control signals.

warning lights to the front mounted above the roofline of the vehicle and not more than two flashing white warning lights to the front mounted below the roofline of the vehicle. These lamps may be in addition to the flashing headlamps permitted under Section 25252.5.

An emergency response or disaster service vehicle owned or leased and operated by the American National Red Cross, or any chapter or branch thereof, and equipped and clearly marked as a Red Cross emergency service or disaster service vehicle, may display flashing amber warning lights to the front, sides, or rear of the vehicle while at the scene of an emergency or disaster operation. Vehicles not used on emergency response shall not be included.