Tell the driver what action to take, use standard hand and paddle signals. The following methods of signaling for STOP, SLOW and GO should be used. Stand on the shoulder, stopsign facing traffic with arm outstretched and palm toward the traffic until the first car is stopped, then move to center of the road. Slow sign facing traffic, arm outstretched and palm down, move hand and arm up and down in a pumping motion. Stand on the shoulder facing the traffic.
Slow sign facing traffic, arm in a sweeping gesture, then end the sweep by directing traffic.
Stand in the lane when traffic uses the left lane, and on the shoulder when traffic uses the right lane. A Pilot Car or Official Car is used with flaggers for lengthy work zones. The traffic control zone is short enough to allow good visibility from one end to the other end. Traffic is normally light to avoid the possibility of opposing traffic arriving at the traffic control zone at the same time. Radios may be desirable even when visual contactis possible.