Temporary · Diamond · MUTCD 11th edition
W20-4 One Lane Road Ahead
W20-4 One Lane Road Ahead sign from the MUTCD 11th edition: 3 standard sizes (30" × 30", 36" × 36", and 48" × 48"), with letter heights, border widths, and colors.
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Standard sizes
| Size | Road type | Border | Corner radius | LettersONE LANE ROAD AHEAD |
|---|---|---|---|---|
| 30" × 30" | Conventional Road, Single LaneConventional Road, Multi-Lane | 3/4" | 1 7/8" | 4"FHWA Series C |
| 36" × 36" | Expressway | 7/8" | 2 1/4" | 5"FHWA Series C |
| 48" × 48" | Freeway | 1 1/4" | 3" | 7"FHWA Series C |
02
Colors
- Legend
- Black
- Background
- Orange
- Border
- Black
03
Standard reference
- SHS 2024 sheet 5-26 (W20-4, 30 in); MUTCD 11th ed. Table 6F-1
- SHS 2024 sheet 5-26 (W20-4, 36 in); MUTCD 11th ed. Table 6F-1
- SHS 2024 sheet 5-26 (W20-4, 48 in); MUTCD 11th ed. Table 6F-1
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