Where:
On any road, including highways, urban streets, and rural roads, where construction, maintenance, or repair work is taking place.

Purpose:
To warn drivers that temporary road works are ahead which may involve lane closures, detours, workers on or near the road, construction equipment, uneven surfaces, or other temporary hazards.
The sign alerts drivers to be cautious and ready for changes in normal traffic patterns.

Action:
Reduce your speed and prepare for possible stops or sudden changes in traffic flow.
Look out for additional temporary traffic signs, cones, barriers, or signals indicating lane changes or detours.
Be vigilant for workers on or near the road; maintain a safe distance from them.
Watch for vehicles entering or leaving the work zone, including construction equipment.
Follow any instructions given by traffic controllers, flag persons, or temporary traffic lights.
Be especially careful in poor weather, low visibility, or at night when hazards may be harder to see.