C12(CA) Narrow Lane
Warns that a traffic lane is narrow. Drivers should expect reduced lateral clearance in the signed area.
- Sign Name
- Narrow Lane
- MUTCD Code
- C12(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 136" × 36"
- Layout 248" × 48"
California Application & Variants
The drawing permits the plural LANES in place of LANE. Although the older specification states a yellow background, CA MUTCD Section 6H.01 generally requires orange or fluorescent orange for TTC warning signs, with stated exceptions. The orange TTC illustration is not a drawing-color correction.
Permitted messages
- NARROW LANE
- NARROW LANES
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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