Safety lighting may be installed at any interchange, highway intersection, or other decision-making point or points of nighttime hazard. Safety lighting may be used to the extent necessary to provide for safety enhancement and the orderly movement of traffic.

There are three kinds of safety lighting:

partial interchange/intersection

,

complete interchange/intersection

, and

spot

. Which is used depends on the warranting conditions.

Partial interchange/intersection lighting

covers:

Complete interchange/intersection lighting

covers the limits of the interchange, including:

Spot lighting

is another kind of safety lighting. Spot lighting usually consists of one to five units intended to illuminate a nighttime hazard, such as sections with complex geometry or raised channelization.

For contracting purposes, all types of safety lighting are handled in the same manner.