W3 Series — Intersection and Traffic Signal Warning Signs

The W3 Series covers warning signs that alert drivers to stopping and signaling conditions ahead. W3-4 (BE PREPARED TO STOP) is the most common W3 sign in temporary traffic control — used ahead of flagging stations, queues, and temporary traffic signals where drivers must be ready to stop. W3-1 (STOP AHEAD) is used where a stop sign or full stop is required before reaching the work area, and W3-3 (SIGNAL AHEAD) warns of a traffic signal — including a temporary work-zone signal — ahead.