The Federal Motor Carrier Safety Administration (FMCSA) is a U.S. government agency under the Department of Transportation. Its primary mission is to ensure the safety of commercial motor vehicles on the nation's roads. The FMCSA sets regulations for the operation of large trucks and buses, focusing on reducing accidents, injuries, and fatalities. The agency also oversees the licensing and training of commercial drivers, as well as the enforcement of safety standards. By conducting inspections and audits, the FMCSA works to improve compliance among motor carriers and promote safe driving practices across the industry.