A motor carrier inspector is a government transportation official who is responsible for the enforcement of a variety of regulations related to commercial motor vehicle travel. As a motor carrier inspector, your duties include inspecting transport and freight vehicles, ensuring that the driver of the car is following the law, and checking that the weight and size of the vehicle meet state or federal guidelines. Your responsibilities also include responding to stranded motor vehicle passengers, assisting with natural disaster response and relief, and participating in accident investigation operations.