USDOT Number
Definition. USDOT Number is a federal registration number required for any commercial vehicle > 10,001 lbs GVWR operating interstate.
Also known as: DOT Number, USDOT
Issued by the Federal Motor Carrier Safety Administration (FMCSA). Many states also require USDOT for intrastate operation of certain commercial vehicles. Distinct from MC Authority (which is operating authority).
Sources cited
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