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Nationwide truck compliance guide

USDOT Number Requirements by State

Compare federal USDOT marking rules with state-specific intrastate requirements. Rules vary by vehicle, weight, cargo, passenger capacity, and whether the operation crosses state lines.

Start With the Federal Rule

Federal rule 49 CFR 390.21 generally requires covered interstate commercial motor vehicles to display the carrier legal name or one trade name and the assigned number preceded by USDOT on both sides. Markings must contrast and remain legible from 50 feet in daylight while stationary.

Custom Boat Registration Number Decals example from Same Day Vinyl

Key Compliance Points

  • Florida, Texas, California, and Georgia guides
  • North Carolina and South Carolina guides
  • New York and Pennsylvania guides
  • Ohio and Michigan guides
  • Every page includes an official agency source

State Guides and Ordering

Use the individual state guides to identify questions for the proper agency, then order application-ready USDOT decals or a complete truck door kit through our customizer.

Official Source and Accuracy

Last reviewed August 29, 2026. This practical summary is not legal advice. Confirm current requirements with the cited state agency and FMCSA. Official source: https://www.fmcsa.dot.gov/registration/do-i-need-usdot-number

Order Durable Truck Lettering

Same Day Vinyl produces application-ready USDOT decals and truck door kits nationwide. Verify all registration information before ordering.