Every vehicle upon a highway within this state at any time from a half hour after sunset to a half hour before sunrise and at any other time when, due to insufficient light or unfavorable atmospheric conditions, persons and vehicles on the highway are not clearly discernible at a distance of one thousand feet ahead shall display lighted headlights, other lights, and illuminating devices as hereinafter respectively required for different classes of vehicles, subject to exceptions with respect to parked vehicles, and such stop lights, turn signals, and other signaling devices shall be lighted as prescribed for the use of such devices.
RCW 46.37.020
When lighted lamps and signaling devices are required.
Applied in 6 court decisions — leading case 174 Wash. 2d 177 - State v. Snapp (2012)
Most recently applied in State v. Creed (February 2014)
1977 ex.s. c 355 s 2; 1974 ex.s. c 124 s 2; 1963 c 154 s 2; 1961 c 12 s 46.37.020
How often courts cite this section
Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.