School · Rectangle · MUTCD 11th edition
S4-4P When Flashing (plaque)
S4-4P When Flashing plaque from the MUTCD 11th edition: 2 standard sizes (24" × 12" and 36" × 18"), with letter heights, border widths, and colors.
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Standard sizes
| Size | Road type | Border | Corner radius | LettersWHEN FLASHING |
|---|---|---|---|---|
| 24" × 12" | — | 5/8" | 1 1/2" | 2 1/2"FHWA Series D |
| 36" × 18" | — | 7/8" | 2 1/4" | 4"FHWA Series D |
02
Colors
- Legend
- Black
- Background
- Fluorescent Yellow-Green
- Border
- Black
03
Standard reference
- SHS 2024 sheet 6-7 (S4-4P, 24x12 in); MUTCD 11th ed. Table 2C-1
- SHS 2024 sheet 6-7 (S4-4P, 36x18 in); MUTCD 11th ed. Table 2C-1
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