(a)Any motor vehicle may be equipped with not more than 2 side cowl or fender lamps which shall emit an amber or white light without glare.
(b)Any motor vehicle may be equipped with not more than 1 running board courtesy lamp on each side thereof which shall emit a white or amber light without glare.
(c)Any motor vehicle may be equipped with not more than 2 backup lamps either separately or in combination with other lamps, but any such backup lamp shall not be lighted when the motor vehicle is in forward motion.
(d)(1) Any vehicle may be equipped with lamps which may be used for the purpose of warning the operators of other vehicles of the presence of a vehicular traffic hazard requiring the exercise of unusual care in approaching, overtaking or passing and when so equipped may disp
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(a) Any motor vehicle may be equipped with not more than 2 side cowl or fender lamps which shall emit an amber or white light without glare.
(b) Any motor vehicle may be equipped with not more than 1 running board courtesy lamp on each side thereof which shall emit a white or amber light without glare.
(c) Any motor vehicle may be equipped with not more than 2 backup lamps either separately or in combination with other lamps, but any such backup lamp shall not be lighted when the motor vehicle is in forward motion.
(d) (1) Any vehicle may be equipped with lamps which may be used for the purpose of warning the operators of other vehicles of the presence of a vehicular traffic hazard requiring the exercise of unusual care in approaching, overtaking or passing and when so equipped may display such warning in addition to any other warning signals required by this subchapter.
(2) a. The lamps used to display such warning to the front shall be mounted at the same level and as widely spaced laterally as practicable and shall display simultaneously flashing white or amber lights, or any shade of color between white and amber.
b. The lamps used to display such warning to the rear shall be mounted at the same level and as widely spaced laterally as practicable, and shall show simultaneously flashing amber or red lights, or any shade of color between amber and red.
c. These warning lights shall be visible from a distance of not less than 500 feet under normal atmospheric conditions at night.
(3) a. Flashing headlights may be installed upon any motor vehicle being used by a fire chief, assistant fire chief, fire engineer, fire police officer, police officer, a firefighter who is a member of any regularly established fire company or by an ambulance attendant who is a member of any regularly established ambulance service. Flashing lights shall only be installed if duly authorized by the fire chief or ambulance captain of the respective fire or ambulance company. The lights shall be used only in response to duty as a first responder. Only those firefighters or ambulance attendants of regularly established fire companies duly designated as first responders by their respective fire chief, or those ambulance attendants of other regularly established ambulance services duly designated as first responders by their respective ambulance captain, shall be authorized to use such flashing lights, notwithstanding § 4353(c) of this title. Nothing in this section shall be interpreted to grant emergency vehicle status to firefighters or ambulance attendants making use of such signals in their personal vehicles pursuant to § 4106 of this title. Flashing lights as used in this subsection shall mean a sudden and transient outburst of bright light either operated or activated by 4-way flashers and/or by a high and low beam headlight switch on the vehicle.
b. Modulating headlights may be installed on motorcycles for the purpose of warning other vehicles of their presence requiring the exercise of unusual care in approaching, overtaking, or passing, notwithstanding § 4353(c) of this title. Such modulating headlights must conform to the motorcycle headlamp modulation system requirements of 49 C.F.R. § 571.108 S10.17.5. Nothing in this section shall be interpreted to grant emergency status to motorcycle operators making use of such modulating headlights.