C23BP(CA) Highway Widening
Identifies highway-widening work. The supplemental message describes the type of construction operation.
- Sign Name
- Highway Widening
- MUTCD Code
- C23BP(CA)
- California designation
- California-coded sign
- Official designation
- Current Caltrans catalog designation: C23BP(CA). The retained official drawing uses the earlier code C23B(CA).
- Sign Category
- California Construction Signs
Specifications
- Shape
- Rectangle (Horizontal)
- Color / legend
- Orange background, black legend
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 1Variable width × 18" height
- Layout 2Variable width × 24" height
California Application & Variants
This is the ROAD (STREET) WORK informational plaque referred to as C23B(CA) in CA MUTCD Section 6H.03. HIGHWAY WIDENING is an example message, not the only permitted wording. Messages must use terms common to motorists, and the plaque width must not exceed the overall width of W20-1.
Placement Context
- Where it sits
- At the location appropriate to the displayed instruction or warning, using the official drawing and project traffic-control plan.
- CA MUTCD reference
- CA MUTCD 2026 Chapter 6H — TTC Zone Warning Signs
Related Signs
Browse California Construction 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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