R9-20 BICYCLES ALLOWED USE OF FULL LANE Requirements
Application notes for R9-20 BICYCLES ALLOWED USE OF FULL LANE. The official manual distinguishes mandatory standards, recommended guidance, and optional applications; consult the linked sources for the provisions that apply.
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 Use the current ALLOWED USE OF FULL LANE legend, not the superseded R4-11 identity.
1. When BICYCLES ALLOWED USE OF FULL LANE Is Used
Informs road users that bicyclists are allowed to use the full travel lane.
- Pedestrian and bicycle route review
2. Placement and Application Notes
Position R9-20 at the location and facing the approach identified by the linked manual; match any directional arrow to the actual assembly..
- Place the sign where the intended road users have a clear, unobstructed view on approach.
- Use the mounting height and lateral placement specified for the sign and installation type.
- Use sign assemblies and supplemental plaques only as provided in the applicable manual and approved design.
3. Layout Sizes and Visibility Considerations
Linked-layout dimensions: 30" × 30". Check the applicable MUTCD and agency requirements for the required installation size.
- Choose size based on roadway speed, sight distance, and mounting location.
- Use the visibility and material requirements specified for this sign and installation.
4. Sign Selection Checks
- Match R9-20 to the intended regulation and actual site arrangement.
- 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 Use the current ALLOWED USE OF FULL LANE legend, not the superseded R4-11 identity.
- Select the size and installation using the applicable California manual provisions and responsible agency requirements.
Related Resources
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Verify R9-20 Requirements
This is an educational reference. Verify sign use, size, placement, and application against the current CA MUTCD, Caltrans sign specifications, Standard Plans, and the reviewing agency. Official source links are gathered in one place.
View official sourcesEducational 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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