R8-10 STOP HERE WHEN FLASHING (STRAIGHT ARROW) Requirements
Application notes for R8-10 STOP HERE WHEN FLASHING (STRAIGHT 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 at a grade crossing to identify the stop line or stopping point. Match the arrow to that location; this sign is not the STOP HERE ON RED traffic-signal sign.
1. When STOP HERE WHEN FLASHING (STRAIGHT ARROW) Is Used
Identifies the stopping point when grade-crossing flashing-light signals are active.
- Emergency-stop or grade-crossing review
2. Placement and Application Notes
Position R8-10 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" × 36"; 36" × 48". 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 R8-10 to the intended regulation and actual site arrangement.
- Use at a grade crossing to identify the stop line or stopping point. Match the arrow to that location; this sign is not the STOP HERE ON RED traffic-signal sign.
- Select the size and installation using the applicable California manual provisions and responsible agency requirements.
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Verify R8-10 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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