FMCSA Motor Carrier Identification — 49 CFR 390.21
Regulation 49 CFR 390.21 · Canada
§Source summary
49 CFR 390.21 — Regulation 49 CFR 390.21
All commercial motor vehicles operated in the US generally display the USDOT number and operating carrier name on both sides of the power unit per 49 CFR 390.21.
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Any truck operating in the USA needs a USDOT number and the operating company name on both sides of the cab — even if the truck is Canadian.
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USDOT number on both sides — legible from 50 ft in daylight
Operating carrier name both sides
Applies to any vehicle operating in USA
Includes Canadian trucks crossing border
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🏛 Official Government Sources
FMCSA — Federal Motor Carrier Safety Administration
US Department of Transportation · March 2026
FMCSA regulates commercial vehicles entering the US. Canadian carriers need USDOT numbers, MC authority, and compliant vehicle markings for cross-border operations.
USDOT Number Requirements — 49 CFR Part 390
US Electronic Code of Federal Regulations · March 2026
49 CFR Part 390 defines USDOT number display requirements: minimum letters legible from 50 feet, contrasting colour, on both sides of the power unit.
CBSA — Canada Border Services Agency Commercial
CBSA · March 2026
CBSA commercial regulations for cross-border trucking. Covers pre-arrival manifests, customs bonds, and documentation requirements.
All sources are official government publications or recognized industry authorities. Links verified March 2026. If you find a broken link, let us know.
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Shop USDOT DecalsOr call (289) 228-7021Regulation Quick Facts
- Regulation
- 49 CFR 390.21
- Jurisdiction
- 🇨🇦 Canada
- Category
- Cross-Border Compliance
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