§ 39-21-01 — When lighted lamps are required

Subject to the exceptions for parked vehicles, every vehicle upon a highway within this state
must display lighted headlamps, taillamps, and illuminating devices as required in this chapter
for different classes of vehicles as follows:
1. At any time from sunset to sunrise, and every farm tractor upon a highway within this
state at any time from a half hour after sunset to a half hour before sunrise;
2. At any time when it is raining, snowing, sleeting, or hailing or during other adverse
driving conditions and these conditions do not render a person or vehicle on the
highway clearly discernible at a distance of one thousand feet [304.8 meters] ahead;
or
3. At any other time when visibility is impaired by weather, smoke, fog, or other
conditions, or when there is insufficient light to render a person or vehicle on the
highway clearly discernible at a distance of one thousand feet [304.8 meters] ahead.
Stoplights, turn signals, and other signaling devices must be lighted as prescribed for the use of
these devices.