Types of trucks (1 of 2): heavy truck used to carry heavy loads.
Truck tractor: motorized wheeled vehicle for towing other vehicles.
Semitrailer: motorless wheeled vehicle meant to be towed.
Trailer: motorless wheeled vehicle meant to be towed.
Articulated vehicle or road train: highway vehicle comprised of a tractor and two or more truck trailers.
Tank truck: closed tank for liquid.