SC20(CA) SLOW FOR THE CONE ZONE Requirements
Application notes for SC20(CA) SLOW FOR THE CONE ZONE. The official manual distinguishes mandatory standards, recommended guidance, and optional applications; consult the linked sources for the provisions that apply.
California Application & Variants
SLOW FOR THE CONE ZONE uses a black border and legend on an orange retroreflective background.
Size selection: The drawing labels horizontal dimension A and vertical dimension B. Its table lists A × B as 36 × 42 and 48 × 54 inches, although the illustration appears wider than tall. These are the tabulated dimensions; do not infer dimensions or orientation from the preview proportions. Resolve any fabrication question with Caltrans using the original specification.
1. When SLOW FOR THE CONE ZONE Is Used
Displays SLOW FOR THE CONE ZONE on an orange sign. The message encourages drivers to reduce speed near roadway work.
2. Placement and Application Notes
Position SC20(CA) at the location appropriate to the displayed instruction or warning, using the official drawing and project traffic-control plan.
- 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: 36" × 42"; 48" × 54". 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 SC20(CA) and its displayed legend to the intended condition.
- Check the source drawing for the required directional or message variant.
Related Resources
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Verify SC20(CA) 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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