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.

bus may display flashing amber warning lights to the front, sides, or rear when necessarily parked on a highway.

Vehicles actually engaged in the construction, removal, maintenance, or inspection of any oil or gas pipeline may display flashing amber warning lights to the front, sides, or rear when necessarily parked on a highway or when necessarily moving at a speed slower than the normal flow of traffic and only in accordance with Section 25268.

Any vehicle having personnel aerial lift equipment, actually engaged in the construction, removal, maintenance or inspection of any building, structure, or appurtenances thereto, including the cutting or trimming of trees immediately adjacent thereto, may display flashing amber warning lights to the front, sides, or rear when necessarily parked on a highway or when moving at a speed slower than the normal flow of the traffic.

Any hazardous substance spill response vehicle, under contract to the Department of Transportation for the cleanup of hazardous substance spills, may display flashing amber warning lights to the front, sides, or rear of the vehicle while it is engaged in the actual cleanup of the spill. The warning lights shall be removed or covered with opaque material whenever the vehicle is not actually engaged in the cleanup of a hazardous substance at the scene of the spill.

Vehicles used by a county or county department of agriculture and vehicles of duly authorized representatives thereof, actually engaged in weed control or pest detection, may display flashing amber warning lights to the front, sides, or rear when necessarily parked on a highway or when moving at a speed slower than the normal flow of traffic.

An armored car may be equipped with red lights which may be used while resisting armed robbery. At all other times the red lights shall not be lighted. The authority to use red lights granted by this section does not constitute an armored car an authorized emergency vehicle, and all other provisions of this code applicable to drivers of vehicles apply to drivers of armored cars.

Trucks actually engaged in the towing of houses or buildings upon any highway may display flashing amber warning lights to the front, sides or rear on the vehicle or load.

Any motor vehicle operated by a coroner, or by a deputy coroner, and which is at the scene of any violent highway death, may display flashing amber warning lights to the front or rear.

Repair vehicles of sanitary districts or county sanitation districts necessarily parked other than adjacent to the curb in a highway for purposes of repairing district facilities, may display flashing amber warning lights to the front, sides or rear, but these lights shall not be lighted when the vehicle is in motion.

Vehicles owned by the state and operated by officers or employees of the state who are actually engaged in aqueduct or levee construction, maintenance, patrol, or inspection, or in stream measurement work, may display flashing amber warning lights to the front, sides and rear when parked on the traveled roadway so as to partially obstruct the free flow of traffic, or when moving at a speed slower than the normal flow of traffic.

Vehicles used by mosquito abatement districts or pest abatement districts when dispersing insecticides may display flashing amber warning lights to the front or rear while the vehicles are parked or working on the highway.

No person shall display a flashing amber warning light on a vehicle as permitted by this code except when an unusual traffic hazard exists.

No person shall display a flashing or steady burning red warning light on a vehicle except as permitted by Section 21055 or when an extreme hazard exists.

Any pilot car required by the permit referred to in Section 35780 or 35790, or any vehicle or combination of vehicles subject to the permit if specified in the permit, shall be equipped with flashing amber warning lights to the front, sides or rear. The pilot car and any vehicles required by the permit to have flashing amber warning lights, shall display the flashing amber warning lights while actually engaged in the movement described in the permit. The warning lamps shall be removed or covered with opaque material whenever the pilot car is not escorting the movement described in the permit.

Any motor vehicle engaged in, or aiding in, the herding of livestock along or across a public roadway may display flashing amber warning lights to the front, sides, or rear of the vehicle while it is stopped in the roadway near the livestock or is proceeding with the livestock along the roadway.

Any publicly owned vehicle or any vehicle operated by a corporation incorporated under Part 4 (commencing with Section 10400) of Division 2 of Title 1 of the Corporations Code for the purpose of the prevention of cruelty to animals, when used for removing dead animals, injured animals, or loose livestock, may, display flashing amber warning lights to the front or rear when necessarily parked on the roadway or when moving at a speed slower than the normal flow of traffic.

Any publicly owned vehicle used for the enforcement of animal control laws contained in a statute, local ordinance, or regulation may display flashing or revolving amber warning lights to the front, sides, or rear of the vehicle when actually engaged in the enforcement of those laws and when necessarily parked on a roadway or moving at a speed slower than the normal flow of traffic.

A motor vehicle used by a rural mail carrier may display flashing amber warning lights to the front and rear of the vehicle while the vehicle is necessarily stopped or stopping upon a roadway for the delivery of United States mail.

Any motor vehicle owned and operated by a school district with an average daily attendance in excess of 400,000 while being used to measure the distance from school to a school pupil’s residence may display a flashing amber warning light to the rear of the vehicle when moving at a speed substantially slower than the normal flow of traffic.

Any vehicle owned by a cable television company and operated by employees, or duly authorized representatives, of a cable television company, when actually engaged in the construction, removal, maintenance or inspection of cable television facilities, including but not limited to, the cutting or trimming of trees immediately adjacent thereto, may display flashing amber warning lights to the front, sides, or rear when necessarily parked on a highway or when moving at a speed slower than the normal flow of traffic.

For the purposes of this section, “cable television company” means any person engaged in the business of transmitting

television programs by cable to subscribers for a fee.

Any truck or truck tractor which is primarily used in the transportation of loads specified in subdivision (a) of Section 35414, may be equipped with a flashing amber warning lamp. Such lamp may be displayed to the front, sides, or rear of the combination only when its length exceeds 75 feet and when an unusual traffic hazard exists.

Any bus operated either by a public agency or under the authority of a certificate of public convenience and necessity issued by the Public Utilities Commission may be equipped with a system of crime alarm lights. The system of crime alarm lights shall consist of the installation of additional lamp sources, not exceeding 32 standard candlepower or 30 watts, in the front and rear clearance lamps required or permitted by Section 25100. Such lamps shall be operated by a flasher unit or units that are not audible inside the bus. When actuated, both rear crime alarm lights shall flash simultaneously and both front crime alarm lights shall flash simultaneously. Crime alarm

lights shall be actuated only when a crime is in progress on board the bus or has recently been committed on board the bus.

organization, display the flashing amber lights of the system when necessarily parked upon a highway and in the process of loading or unloading persons.

Any vehicle used by any police department, sheriff’s office, or other governmental agency for the purpose of enforcing parking laws contained in the Vehicle Code or in a local ordinance or regulation may display flashing or revolving amber warning lights to the front, sides, or rear of the vehicle when actually engaged in the enforcement of such laws and when either necessarily stopped on a street, or when moving at a speed slower than the normal flow of traffic.

Any vehicle owned or operated by a land surveyor or civil engineer licensed to practice in this state may display flashing amber warning lights to the front, sides, or rear, if the vehicle is engaged in any phase of a project that requires surveying or surveying related activities to be performed on a highway, or in the vicinity of a highway, and the vehicle is parked on the highway or moving at a speed lower than the normal flow of traffic. The use of, or absence of, amber warning lights as authorized in this section shall not serve as the basis for any

civil action, a defense to a civil action, or establish negligence as a matter of law or negligence per se for comparative fault purposes.

are registered with the Department of Consumer Affairs under Article 3 (commencing with Section 7582) of Chapter 11.5 of Division 3 of the Business and Professions Code may be equipped with a flashing amber warning light system while the vehicle is operated on a highway, if the vehicle is in compliance with Section 27605 and is distinctively marked with the words “PRIVATE SECURITY” or “SECURITY PATROL” on the rear and both sides of the vehicle in a size that is legible from a distance of not less than 50 feet.

found to be in violation of this section be immediately removed at the place of business of the vehicle’s owner or a garage.

Vehicles operated by a local public entity, or pursuant to a permit, license, contract, or franchise with a local public entity, and used to collect and transport garbage, rubbish, or refuse may display flashing amber warning lights to the front, sides, or rear while stopped upon a street and actually engaged in the collection of garbage, rubbish, or refuse, or while moving between stops at a speed not greater than 10 miles per hour.

A privately owned or operated water tender vehicle, when used exclusively for contract emergency services provided to any public agency, may display flashing amber warning lights to the front, sides, or rear of the vehicle when necessarily parked on a highway or other public road, blocking or partially blocking a highway or other public road, traveling at a speed slower than the normal flow of traffic, or crossing or entering a highway or other public road. The flashing amber lights shall not be displayed when the water tender vehicle is traveling to or from an

emergency at the normal speed and flow of traffic, except when the vehicle is traveling in escort with a fire engine or other authorized emergency vehicle. The lights shall be covered with an opaque material when not being displayed.

Any vehicle owned or operated by a contractor or a construction company licensed to operate in this state pursuant to the Business and Professions Code may display flashing amber warning lights to the front, sides, or rear, if the vehicle is engaged in any phase of a construction project performed on a highway, or in the vicinity of a highway, and the vehicle is parked on the highway or moving at a speed lower than the normal flow of traffic. The use of, or absence of, amber warning lights as authorized in this section shall not serve as the basis for any civil

action, a defense to civil action, or establish negligence as a matter of law or negligence per se for comparative fault purposes.