A truss bridge is a type of bridge that uses a framework of triangular shapes, known as trusses, to support its structure. This design helps distribute weight evenly, making the bridge strong and stable. Truss bridges are often made from materials like steel or wood and are commonly used for spanning long distances. The triangular configuration of the trusses allows for efficient load transfer, which means they can carry heavy loads while using less material. Truss bridges are popular in both road and rail applications, providing a reliable solution for crossing rivers, valleys, and other obstacles in transportation networks.