C23(CA) Road / Ramp Work Ahead
Warns of work ahead on a road or ramp. The older drawing permits ROAD WORK AHEAD and RAMP WORK AHEAD; the current California manual identifies the ramp application as C23(CA).
- Sign Name
- Road / Ramp Work Ahead
- MUTCD Code
- C23(CA)
- California designation
- California-coded sign
- Sign Category
- California Construction Signs
Specifications
- Shape
- Diamond
- 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.
Dimensions are side lengths of the diamond, not its corner-to-corner span.
- Layout 130" × 30"
- Layout 248" × 48"
California Application & Variants
The older Caltrans C23(CA) drawing shows ROAD WORK AHEAD and permits RAMP as the first line. Current CA MUTCD 2026 Section 6H.03 identifies RAMP WORK AHEAD as C23(CA), which may substitute for W20-1 where applicable. W20-1 is the ROAD (STREET) WORK sign. The illustrated ROAD legend and the current California ramp application must be read in that context.
Permitted messages
- ROAD WORK AHEAD
- RAMP WORK AHEAD
Size selection: The linked older drawing shows 30 × 30 and 48 × 48 inches. Current Table 6H-1(CA) lists 36 × 36 inches for the conventional-road minimum and 48 × 48 inches for expressways/freeways. Drawing dimensions alone do not establish the required installation size.
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
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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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