A "Five-Axle" vehicle refers to a type of truck or trailer that has five axles. Axles are the rods that connect the wheels and allow them to rotate. The number of axles affects the vehicle's weight capacity, stability, and maneuverability. Five-axle vehicles are commonly used for transporting heavy loads, such as construction materials or large equipment. In the context of transportation regulations, five-axle vehicles often have specific weight limits and requirements. These regulations help ensure road safety and protect infrastructure. The design of five-axle trucks allows for better weight distribution, which can reduce wear on roads and improve fuel efficiency.