ROAD CLOSED AHEAD Sign Requirements

1. When a ROAD CLOSED AHEAD Sign Is Used

Warns that the road ahead is closed and that through travel will not be possible, giving drivers time to turn or follow a detour before reaching the closure.

• Advance warning ahead of a full roadway closure
• Used with R11-2 / R11-3a and detour markers
• Common on utility cuts, paving, and emergency closures

2. How and Where It Applies

In the field, W20-3 Road Closed Ahead is typically positioned at the advance warning area, ahead of the work. Common deployments include advance warning ahead of a full roadway closure; used with R11-2 / R11-3a and detour markers; common on utility cuts, paving, and emergency closures. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.

3. Placement and Application Notes

Position W20-3 advance warning area, ahead of the work.

• Place the sign where drivers have a clear, unobstructed view on approach.
• Mount at the standard height and setback from the edge of the traveled way.
• Do not mount with other signs on the same post unless space constraints require it.

4. Standard Sizes and Visibility Considerations

Typical minimum: 48" × 48" on conventional roads; 60" × 60" on expressways and freeways.

• Choose size based on roadway speed, sight distance, and mounting location.
• Maintain high retroreflectivity for maximum night and adverse-weather visibility.

5. California Notes

Placed in advance of a closure in a California TTC zone, working together with regulatory ROAD CLOSED (R11-2) signing and detour route markers at the closure point.

6. Common Field or Planning Mistakes

• Closure limits on the plan do not match the approved permit exactly.
• Closure not backed by advance warning and a signed detour.
• Local-access provisions unclear (especially for ROAD CLOSED TO THRU TRAFFIC).
• Barricade type (e.g., Type III) not specified.