The Department of Transportation’s Federal Motor Carrier Safety Administration (FMCSA) requires that all specified components of any commercial motor vehicle be inspected at least every 12 months, sometimes more frequently in certain cases. The term commercial motor vehicle includes each vehicle in a combination vehicle. For example, for a tractor semitrailer, full trailer combination, the tractor, semitrailer, and the full trailer (including the converter dolly if so equipped) must each be inspected.
