Regulatory · Rectangle · MUTCD 11th edition
R4-3 Slower Traffic Keep Right
R4-3 Slower Traffic Keep Right sign from the MUTCD 11th edition: 5 standard sizes (24" × 30", 36" × 48", 48" × 60", 18" × 24", and 12" × 18"), with letter heights, border widths, and colors.
01
Standard sizes
| Size | Road type | Border | Corner radius | LettersSLOWER TRAFFIC KEEP RIGHT |
|---|---|---|---|---|
| 24" × 30" | Conventional Road, Single LaneConventional Road, Multi-Lane | 5/8" | 1 1/2" | 4"FHWA Series D |
| 36" × 48" | Expressway | 7/8" | 2 1/4" | 6"FHWA Series D |
| 48" × 60" | Freeway | 1 1/4" | 3" | 8"FHWA Series D |
| 18" × 24" | — | 5/8" | 1 1/2" | 3"FHWA Series D |
| 12" × 18" | — | 0.438" | 1 1/2" | 1 3/4"FHWA Series D |
02
Colors
- Legend
- Black
- Background
- White
- Border
- Black
03
Standard reference
- SHS 2004 sheet 1-63 (R4-3, 24 x 30); MUTCD 11th ed. Table 2B-1
- SHS 2004 sheet 1-63 (R4-3, 36 x 48); MUTCD 11th ed. Table 2B-1
- SHS 2004 sheet 1-63 (R4-3, 48 x 60); MUTCD 11th ed. Table 2B-1
- SHS 2004 sheet 1-63 (R4-3, 18 x 24); MUTCD 11th ed. Table 2B-1
- SHS 2004 sheet 1-63 (R4-3, 12 x 18)
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