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DOT Number

Also known as: USDOT number

A DOT number is a unique identifier issued by the United States Department of Transportation to commercial vehicle operators, used to track safety records, inspections, and compliance reviews.

Requirements depend on vehicle weight, passenger capacity, and whether the operator crosses state lines. Many limousine operators running larger vehicles or interstate routes must carry one.

Related terms

  • TCP Number

    A TCP number is the permit identifier issued to a Transportation Charter Party carrier, authorising a company to provide prearranged passenger transportation for compensation.

  • Livery

    Livery is the regulatory and industry term for for-hire passenger vehicle service that must be booked in advance and cannot be hailed on the street.

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