Dimensions are in the official PDF. Opens in a new tab.
R10-10c Requirements & Application NotesR10-10c Left (Right) Turn Lane Signal
Identifies a separate signal face controlling the indicated turn lane at a grade crossing pre-signal or queue cutter signal.
- Sign Name
- Left (Right) Turn Lane Signal
- MUTCD Code
- R10-10c
- Sign Category
- Regulatory Signs
Specifications
- Shape
- Rectangle (Vertical)
- Color / legend
- White background, black legend and border
Official Dimension Drawing
Source size discrepancy: the FHWA drawing schedules show 24 × 30 and 30 × 36 inches. CA MUTCD 2026 Table 8B-1 lists 24 × 36 minimum and 30 × 42 conventional-road sizes. Confirm the required California design and dimensions with the reviewing agency before selecting or fabricating this sign.
California Application & Variants
Source size discrepancy: the FHWA drawing schedules show 24 × 30 and 30 × 36 inches. CA MUTCD 2026 Table 8B-1 lists 24 × 36 minimum and 30 × 42 conventional-road sizes. Confirm the required California design and dimensions with the reviewing agency before selecting or fabricating this sign.
When & Where It's Used
- Signal control and supplemental instructions
Placement Context
- Where it sits
- Locate adjacent to the separate signal face serving the applicable turn lane.
- CA MUTCD reference
- CA MUTCD 2026 §8D.11 and 8D.12
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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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