XCMG's Truck crane provides more mobility in comparison with other types of cranes. Truck crane has two parts: the carrier, often referred to as the Lower, and the lifting component which includes the boom, referred to as the Upper. These are mated together through a turntable, allowing the upper to swing from side to side. Modern hydraulic truck cranes are usually single-engine, with the same engine powering the under carriage and the crane. Generally, truck cranes are able to travel on highways, eliminating the need for special equipment to transport the crane.