R9-20 · Bicycles Allowed Use of Full Lane
R9-20 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 R9-20 Official Dimension Drawing (PDF, opens in a new tab)Official PDF · Opens in a new tab
Dimensions from the Official Drawing
Dimensions checked against the exact official drawing. Select by the applicable roadway or bicycle-facility requirements; displayed hours, fees, and other variable legends are examples.
- Official drawing size30" × 30"
Select using the applicable California sign-size table and actual facility.
The smallest drawing size is not necessarily the permitted application size.
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.
California Application & Variants
May be used where there is no bike lane or usable adjacent shoulder and the travel lane is too narrow for safe side-by-side travel. Use the current ALLOWED USE OF FULL LANE legend, not the superseded R4-11 identity.
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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