This guide summarizes the MUTCD requirements and practical application guidance for the R11-4 ROAD CLOSED TO THRU TRAFFIC sign. Use this resource to understand when it is required, how to place it correctly, and how to maintain clear visibility for safe operations.
Closures that maintain local property access
At the closure point (activity area), typically on a barricade.
Mount at the standard height and setback for the roadway with clear sight lines.
High reflectivity and clear sight lines are essential day and night.
A regulatory sign stating that through travel is closed while still allowing local access to properties within the closure.
A regulatory sign stating that through travel is closed while still allowing local access to properties within the closure. In the field, R11-4 Road Closed To Thru Traffic is typically positioned at the at the closure point (activity area), typically on a barricade. Common deployments include closures that maintain local property access; residential and business-district work; used with detour signing for through traffic. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.
At the closure point (activity area), typically on a barricade.
Typical minimum: 48" × 30".
Used in California where a road must be closed to through traffic but residents, businesses, or deliveries still need local access.
Go to California NotesEducational reference only. This is not an official Caltrans, FHWA, or local agency publication and is not legal or engineering advice. Always verify sign selection, size, placement, spacing, and application against the current CA MUTCD 2026, Caltrans sign specifications, Standard Plans, project documents, and the reviewing agency’s requirements. Local jurisdictions may impose additional requirements, and final selection, placement, and dimensions may require engineering judgment or agency approval. Written against California MUTCD 2026 (effective January 18, 2026) and the Federal MUTCD 11th Edition. Official sources last verified June 2026.
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