A cantilever bridge is a type of bridge that is supported on only one end, allowing it to extend outward without additional support underneath. This design uses cantilevers, which are horizontal beams anchored at one end, to create a stable structure. The weight of the bridge and any loads it carries are balanced by the forces acting on the cantilevers. These bridges are often made of materials like steel or concrete and are commonly used for spanning large distances, such as over rivers or valleys. Their unique design allows for efficient construction and can accommodate heavy traffic while maintaining stability and safety.