New Jersey § 39:3-54

§ 39:3-54.

a. Any lighted lamp or illuminating device upon a motor vehicle other than a headlamp,

spot lamp or auxiliary driving lamp which projects a beam of light of an intensity

greater than 300 candlepower shall be so directed that no part of the beam will strike

the level of the roadway on which the vehicle stands at a distance of more than 75

feet from the vehicle. Flashing lights are prohibited on motor vehicles, motorcycles and motor-drawn vehicles

except as a means for indicating a right or left turn; provided, however, any vehicle

may be equipped, and when required under this article shall be equipped, with lamps

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, shall display such warning in addition to any other

warning signals required by law. The lamps used to display such warning shall be of a type approved by the Director

of the Division of Motor Vehicles; those used to display 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. 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. These warning lights shall be visible from a distance of not less than 500 feet

at any time when lighted lamps are required. The two front and two rear turn signals shall be flashed simultaneously to display

such warning on vehicles of the types mentioned in section 39:3-64 . b. In addition to the flashing devices permitted in subsection a. of this section,

an omnibus may be equipped with two flashing devices for the purpose of warning the

operators of other vehicles and law enforcement officials that an emergency situation

exists within the omnibus. These devices shall be capable of activation by the operator of the omnibus and shall

be of a type approved by the Director of the Division of Motor Vehicles. They shall be mounted one at the front and one at the rear of the omnibus and shall

display flashing red lights which shine on the roadway under the vehicle.