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 commonly made from materials like steel or wood and are often used for spanning long distances. The triangular configuration in a truss bridge allows it to efficiently handle loads, such as vehicles and pedestrians. This design has been widely used since the 19th century and remains popular today due to its durability and cost-effectiveness in construction.