A dump truck is a type of truck car. This is a self-unloading vehicle, with a trailer, a semi-trailer with a body, mechanically tilted for unloading cargo. The load can be unloaded backwards or to the side. As a rule, dump trucks are designed to transport loose or bulk cargo that can be easily tipped from the body. There are several types of dump trucks such as on-road and off-road dump trucks, the latter are also called quarry dump trucks.