Which agency is responsible for regulating the trucking industry?

The Federal Motor Carrier Safety Administration (FMCSA) is the agency specifically tasked with regulating the trucking industry. Its primary responsibilities include establishing safety regulations for commercial drivers and trucking operations, ensuring compliance with federal laws, and enhancing roadway safety. The FMCSA focuses on a wide range of issues such as driver qualifications, vehicle maintenance, and transportation of hazardous materials.

While other agencies, like the Department of Transportation (DOT) and the Environmental Protection Agency (EPA), play roles in broader transportation and environmental regulations, they do not specifically regulate trucking operations. The National Highway Traffic Safety Administration (NHTSA) primarily focuses on vehicle safety standards rather than the operational aspects of the trucking industry. Thus, the FMCSA is recognized as the key authority for overseeing and enforcing trucking regulations, which is why it is the correct answer.