R5-1 Do Not Enter
Prohibits entry into a roadway or lane, telling drivers they must not proceed past the sign in that direction.
- Sign Name
- Do Not Enter
- MUTCD Code
- R5-1
- Sign Category
- Regulatory Signs
Specifications
- Shape
- Square
- Color / legend
- Red background, white legend
Sizes & Dimensions (inches)
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.
- Layout 130" × 30"
- Layout 236" × 36"
- Layout 348" × 48"
When & Where It's Used
- Preventing entry into closed lanes or ramps
- Reinforcing one-way operations through a work zone
- Used with WRONG WAY where wrong-way risk exists
Placement Context
- Where it sits
- Point of regulation within the activity area.
- CA MUTCD reference
- CA MUTCD 2026 Chapter 2B — Regulatory Signs, Barricades, and Gates
Related Signs
Browse Regulatory Signs
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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