A USDOT number is essentially the same as a DOT number, with the prefix “US” indicating it is an American number. In the trucking industry, these terms are used interchangeably, so when someone mentions a USDOT number, they are referring to a DOT number.

An example of a USDOT number could be USDOT1523020, typically printed on every truck in the company’s fleet. This number is prominently displayed on the cab of the truck, often on the driver’s door.

DOT numbers were introduced by the FMCSA to reduce road incidents resulting in loss of life or property damage due to improperly trained drivers or unsafe companies. They achieve this by tracking incidents and accidents caused by specific drivers or companies, with the authority to revoke certification for companies deemed unsafe.