This guide summarizes the MUTCD requirements and practical application guidance for the R11-3b BRIDGE OUT - LOCAL TRAFFIC ONLY sign. Use this resource to understand when it is required, how to place it correctly, and how to maintain clear visibility for safe operations.
Advance signing for a closed/impassable bridge
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.
Warns that a bridge ahead is out (impassable) and that only local traffic should proceed toward it, with through traffic using an alternate route.
Warns that a bridge ahead is out (impassable) and that only local traffic should proceed toward it, with through traffic using an alternate route. In the field, R11-3b Bridge Out - Local Traffic Only is typically positioned at the at the closure point (activity area), typically on a barricade. Common deployments include advance signing for a closed/impassable bridge; allows local access, diverts through traffic; used with detour route markers. 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 advance of a closed or impassable bridge in California, allowing local access while directing through traffic to a signed detour.
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.
Public Ready supports sign selection, project-ready sign packages, and equipment sourcing through qualified providers — with expert support built for compliance.
