USDOT Number Display Requirements — 49 CFR 390.21
Regulation 49 CFR 390.21(b) · Canada
§The Law
49 CFR 390.21(b) — Regulation 49 CFR 390.21(b)
“The USDOT number must be displayed in 2-inch (50mm) minimum characters on both sides of the power unit in a contrasting colour.”
View official regulation text✓Plain English
Your USDOT number goes on both sides of the truck cab in 2-inch minimum letters. It must contrast with the truck colour — white on dark, dark on light.
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Specific Requirements
2" (50mm) minimum character height
Both sides of power unit
Contrasting colour to vehicle background
USDOT prefix included: "USDOT 1234567"
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Shop USDOT DecalsOr call (289) 228-7021Regulation Quick Facts
- Regulation
- 49 CFR 390.21(b)
- Jurisdiction
- 🇨🇦 Canada
- Category
- Cross-Border Compliance
What if 49 CFR 390.21(b) changes next year?
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