W21-7 · Utility Work Ahead
W21-7 Sizes & Dimensions
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. All dimensions below are in inches.
Open W21-7 Official Dimension Drawing (PDF, opens in a new tab)Official PDF · Opens in a new tab
Dimensions from the Official Drawing
Dimensions are side lengths of the diamond, not its corner-to-corner span.
- Layout 130" × 30"
See layout variant and applicable MUTCD size-selection requirements.
Dimensions are side lengths of the diamond, not its corner-to-corner span.
- Layout 236" × 36"
See layout variant and applicable MUTCD size-selection requirements.
Dimensions are side lengths of the diamond, not its corner-to-corner span.
- Layout 348" × 48"
See layout variant and applicable MUTCD size-selection requirements.
Dimensions are side lengths of the diamond, not its corner-to-corner span.
Drawing dimensions are not a universal minimum or an agency approval. 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.
Official References
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.
Need to Rent or Purchase This Sign? Contact Public Ready.
Public Ready supports sign selection, project-ready sign packages, and equipment sourcing through qualified providers — with expert support built for compliance.