§ 39-21-21 — Use of multiple-beam road-lighting equipment

Whenever a motor vehicle is being operated on a roadway or shoulder adjacent thereto
during the times specified in section 39-21-01, the driver shall use a distribution of light, or
composite beam, directed high enough and of sufficient intensity to reveal persons and vehicles
at a safe distance in advance of the vehicle, subject to the following requirements and
limitations:
1. Whenever a driver of a vehicle approaches an oncoming vehicle within five hundred
feet [152.4 meters], such driver shall use a distribution of light, or composite beam, so
aimed that the glaring rays are not projected into the eyes of the oncoming driver. The
lowermost distribution of light, or composite beam, specified in subsection 2 of section
39-21-20 must be deemed to avoid glare at all times, regardless of road contour and
loading.
2. Whenever the driver of a vehicle follows another vehicle within three hundred feet
[91.44 meters] to the rear, the driver shall use a distribution of light permissible under
this chapter other than the uppermost distribution of light specified in subsection 1 of
section 39-21-20.