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California Laws | Vehicle Code
DIVISION 12. EQUIPMENT OF VEHICLES
CHAPTER 2. LIGHTING EQUIPMENT

(b) Identification lamps on such vehicles manufactured prior to January 1, 1968, may exhibit either amber, green, or white light to the front and red light to the rear. (10861)

(c) Identification lamps on such vehicles manufactured on or after January 1, 1968, may exhibit only amber light to the front and red light to the rear. (10862)

(d) Identification lamps are not permitted on passenger vehicles, except housecars and ambulances, regardless of width. (10863)

25352. Any bus operated by a publicly owned transit system on regularly scheduled service may be equipped with a device capable of sending a signal that interrupts or changes the sequence patterns of an official traffic control signal, under the following conditions: (10864)

(a) If such a device is a flashing gaseous discharge lamp, such lamp shall not emit a visible light exceeding an average of 0.0003 candela per flash of any color measured at a distance of 10 feet. (10865)

(b) Such device shall not be installed or used unless and until authorized on specific routes by either the Department of Transportation pursuant to Section 21350 or local authorities pursuant to Section 21351. (10866)

(c) Any bus or system operating under the conditions specified herein shall allow emergency vehicles operating pursuant to Section 25258 or 21055 to have priority in changing the sequence patterns of an official traffic control signal. (10867)

25353. (a) Notwithstanding Sections 25400 and 25950, a bus operated by a publicly owned transit system on regularly scheduled service may be equipped with illuminated signs that include destination signs, route-number signs, run-number signs, public service announcement signs, or a combination thereof, visible from any direction of the vehicle, that emit any light color, other than the color red emitted from forward-facing signs, pursuant to the following conditions: (10868)

(1) Each illuminated sign shall emit diffused nonglaring light. (10869)

(2) Each illuminated sign shall be limited in size to a display area of not greater than 720 square inches. (10870)

(3) Each illuminated sign shall not resemble nor be installed in a position that interferes with the visibility or effectiveness of a required lamp, reflector, or other device upon the vehicle. (10871)

(4) Each illuminated sign shall display information directly related to public transit service, including, but not limited to, route number, destination description, run number, and public service announcements. (10872)

(5) The mixing of individually colored light emitting diode elements, including red, is allowed as long as the emitted color formed by the combination of light emitting diode elements is not red. (10873)

(b) (1) An illuminated sign may be operated as a dynamic message sign in a paging or streaming mode. (10874)

(2) The following definitions shall govern the construction of paragraph (1): (10875)

(A) "Paging," meaning character elements or other information presented for a period of time and then disappearing all at once before the same or new elements are presented, is permitted if the display time of each message is between 2.7 and 10 seconds. Blanking times between each message shall be between 0.5 and 25 seconds. (10876)

(B) "Streaming," meaning character elements or other information moving smoothly and continuously across the display, is permitted if the character movement time, from one end of the display to the other, is at least 2.7 seconds, and the movement time of the entire message does not exceed 10 seconds. (10877)

(c) A regulation adopted pursuant to this section shall comply with applicable federal law, including, but not limited to, the federal Americans with Disabilities Act of 1990 (42 U.S.C. Sec. 12101 et seq.). (10878)

Article 10. Diffused Lights (25400-25401) (10879)(Text)

25400. (a) Any vehicle may be equipped with a lamp or device on the exterior of the vehicle that emits a diffused nonglaring light of not more than 0.05 candela per square inch of area. (10880)

(b) Any diffused nonglaring light shall not display red to the front, but may display other colors. A diffused nonglaring light shall not resemble nor be installed within 12 inches or in such position as to interfere with the visibility or effectiveness of any required lamp, reflector, or other device upon the vehicle. (10881)

(c) A diffused nonglaring lamp or device, other than a display sign authorized by subdivision (d), shall be limited in size to an area of 720 square inches and where any lease, rental, or donation is involved the installation of the lamp or device shall be limited to those vehicles operated either primarily within business or residential districts or municipalities, or between business districts, residential districts, and municipalities in close proximity. (10882)

(d) An internally illuminated sign emitting not more than 0.25 candela per square inch and possessing copy which does not contain a white background may be displayed on each side, but not on the front or rear, of a trolley coach or of a bus being operated in urban or suburban service as described in Section 35107 of this code. (10883)

25401. No diffused nonglaring light on a vehicle shall resemble any official traffic control device. (10884)

Article 11. Acetylene Lamps (25450-25452) (10885)(Text)

25450. Any motor vehicle, other than a motorcycle, equipped with lighted acetylene headlamps complies with the provisions of this code concerning lighted headlamps when it has two lighted acetylene headlamps of approximately equal candlepower mounted upon the front of the motor vehicle and fitted with clear plane glass fronts and bright six-inch spherical mirrors and standard acetylene five-eighths or three-quarters foot burners, not more and not less, projecting sufficient light ahead to reveal any vehicle, person or substantial object upon the roadway within 200 feet. (10886)

25451. Any motorcycle equipped with one lighted acetylene headlamp complies with the provisions of this code concerning lighted headlamps on motorcycles when the acetylene headlamp is fitted with a clear plane glass front and a bright six-inch spherical mirror and a standard acetylene one-half or five-eighths foot burner, projecting sufficient light ahead to reveal any vehicle, person, or substantial object upon the roadway within a distance of 115 feet. (10887)

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