The Worker sign warns of workers in or near the roadway.

The Flagger sign warns drivers they are approaching a location where traffic will be controlled by a flagger.

The Road Work sign provides general warning of a highway work zone ahead. This sign indicates a work zone 1,000 feet ahead.

Lane reduction signs are used on multi-lane roadways to warn of a reduction in the number of lanes available for travel in one direction. This sign advises drivers that the left lane is closed.

Flashing arrow boards warn drivers that the lane they are traveling in is closing ahead and a lane change is required. The arrow direction will indicate which lane is open for travel.

When only the four corners of the board are flashing, drivers must use caution, but do not change lanes. This light pattern is also used when work is on the shoulder of the roadway.