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What is USDOT Number?

Companies which operate commercial vehicles transporting passengers or hauling cargo in interstate commerce must be registered with the

Federal Motor Carrier Safety Administration and must register for a USDOT Number.

The USDOT Number serves as a unique identifier when collecting and monitoring a company’s safety information acquired  during audits, compliance reviews, crash investigations and inspections.

You are required to obtain USDOT Number if you have a vehicle that:

  • Is used to transport the types and quantities of hazardous material requiring a safety permit in interstate commerce (see 49 CFR 385.403), OR
  • Has a gross vehicle weight rating or gross combination weight rating or gross vehicle weight or gross combination weight of 4,536 kg (10,001 pounds)or more whichever is greater, OR
  • Is designed or used to transport more than 8 passengers (including the driver) for compenssation, OR
  • Is designed or used to transport more than 15 passengers, including the driver, and is not used to transport passengers for compensation,


  • Trade, traffic and transportation in the United States –
  • Between a place in a State and a place outside of such State (including a place outside of the United States),
  • Between two places in a State through another State or a place outside of the United States,
  • Between two places in a State as part of trade, traffic or transportation originating or terminating outsside the State or the United States.

You are required by FMCSA to obtain USDOT Number and comply with the Federal Regulations.


What are the USDOT Decal Requirements?

USDOT Numer should be applied to both side of the vehicle. The numbers must be legible from 50 feet away during daylight hours which means you must use an easily readable font and the letters should contrast sharply in color with the background on which the letters are placed.

Many states have size requirements between 2” and 4” for the lettering. The decal or sticker must be applied directly to the vehicle (not on trailers, fuel tank covers or the other removable parts) and must be permanently attached.

If your vehicle will be traveling in Colorado or California, we highly recommend including the last 8 numbers/letters of your VIN. Othr states may require you to include a state abbreviation following the USDOT Number.


  • Decal includes “USDOT” followed by the assigned number.
  • State abbreviation follows the number (if required).
  • Font is legible from 50 feet away during daylight hours.
  • Color of decal contrasts with background color.
  • Decal is permanently affixed to the vehicle and not to a removable part attached to the vehicle.

*Please check the legal requirements for your state. This page is not meant to be a comprehensive resource for USDOT registration information. You are responsible for knowing the specific requirements for your vehicle.

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