M4-10 Detour
Directs traffic along a detour using the word DETOUR within a large horizontal arrow. The linked sheet provides left- and right-pointing variants.
- Sign Name
- Detour
- MUTCD Code
- M4-10
- Sign Category
- Detour Signs
Specifications
- Shape
- Rectangle (Horizontal)
- Color / legend
- Orange background, black legend and arrow (temporary traffic control); fluorescent pink background for the incident-management variant
Sizes & Dimensions (inches)
These are dimensions shown on the linked layout. Select the required size using the applicable MUTCD and agency requirements; the smallest drawing size is not necessarily the permitted minimum.
- Layout size48" × 18"
Placement Context
- Where it sits
- At the detour decision point or route assembly identified by the design.
- CA MUTCD reference
- CA MUTCD 2026 Chapter 6F — TTC Zone Signs — General
Related Signs
Browse Detour Signs
Educational 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. Reference editions: California MUTCD 2026 (effective January 18, 2026) and the Federal MUTCD 11th Edition with Revision 1.
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