Truck drivers throughout the US are regulated by both federal and state regulations. These regulations govern a wide variety of actions, including how many hours of sleep time a trucker is expected to carve out of his schedule. The U.S. Department of Transportation (DOT) and the Federal Motor Carrier Safety Administration (FMCSA) regulate truckers at the federal level, and Tennessee has also enacted relevant regulations. Violation of a trucking regulation can provide the basis for a personal injury claim.