Industries & Professions /
Truck drivers generally are distinguished by the distance they travel. Over-the-road drivers, also known as long-distance drivers or tractor-trailer drivers, haul freight over long distances in large trucks and tractor-trailer rigs that are usually diesel-powered. Depending on the specific operation, over-the-road drivers also load and unload the shipments and make minor repairs to vehicles. Short-haul drivers or pickup and delivery drivers operate trucks that transport materials, merchandise, and equipment within a limited area, usually a single city or metropolitan area. There are approximately 3.2 million truck drivers employed in the United States.