Visibility of reflectors, clearance lamps, identification lamps, and side marker lamps.
RCW 46.37.120
in effect(1) Every reflector upon any vehicle referred to in RCW 46.37.090 shall be of such size and characteristics and so maintained as to be readily visible at nighttime from all distances within six hundred feet to one hundred feet from the vehicle when directly in front of lawful lower beams of head lamps, except that the visibility for reflectors on vehicles manufactured or assembled prior to January 1, 1970, shall be measured in front of the lawful upper beams of headlamps. Reflectors required to be mounted on the sides of the vehicle shall reflect the required color of light to the sides, and those mounted on the rear shall reflect a red color to the rear. (2) Front and rear clearance lamps and identification lamps shall be capable of being seen and distinguished under normal atmospheric conditions at the times lights are required at all distances between five hundred feet and fifty feet from the front and rear, respectively, of the vehicle. (3) Side marker lamps shall be capable of being seen and distinguished under normal atmospheric conditions at the times lights are required at all distances between five hundred feet and fifty feet from the side of the vehicle on which mounted.
(1) Every reflector upon any vehicle referred to in RCW 46.37.090 shall be of such size and characteristics and so maintained as to be readily visible at nighttime from all distances within six hundred feet to one hundred feet from the vehicle when directly in front of lawful lower beams of head lamps, except that the visibility for reflectors on vehicles manufactured or assembled prior to January 1, 1970, shall be measured in front of the lawful upper beams of headlamps. Reflectors required to be mounted on the sides of the vehicle shall reflect the required color of light to the sides, and those mounted on the rear shall reflect a red color to the rear.
(2) Front and rear clearance lamps and identification lamps shall be capable of being seen and distinguished under normal atmospheric conditions at the times lights are required at all distances between five hundred feet and fifty feet from the front and rear, respectively, of the vehicle.
(3) Side marker lamps shall be capable of being seen and distinguished under normal atmospheric conditions at the times lights are required at all distances between five hundred feet and fifty feet from the side of the vehicle on which mounted.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=46.37&full=trueFetched: 6/29/2026