R8-10a STOP HERE WHEN FLASHING (CURVED ARROW) Requirements
Application notes for R8-10a STOP HERE WHEN FLASHING (CURVED ARROW). The official manual distinguishes mandatory standards, recommended guidance, and optional applications; consult the linked sources for the provisions that apply.
California Application & Variants
Use the current Release 4 drawing. The displayed left-arrow face is one official directional option; select the correct arrow for the actual stopping point.
1. When STOP HERE WHEN FLASHING (CURVED ARROW) Is Used
Identifies the stopping point at an active grade crossing using a curved arrow.
- Emergency-stop or grade-crossing review
2. Placement and Application Notes
Position R8-10a 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: 24" × 30"; 36" × 42". 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 R8-10a to the intended regulation and actual site arrangement.
- Use the current Release 4 drawing. The displayed left-arrow face is one official directional option; select the correct arrow for the actual stopping point.
- Select the size and installation using the applicable California manual provisions and responsible agency requirements.
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Verify R8-10a 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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