Bridges are the types of structures that are constructed to span over physical obstacles like water, a valley, a busy or unsafe road, or train tracks. Bridges are constructed to become a passage over an obstacle that is difficult to cross safely. Some Bridges are designed for pedestrians, others for vehicle traffic, and others for a combination of both. Bridges embody different designs depending on its location, materiality, and purpose. The types of Bridges include beam bridges, truss bridges, tied-arch bridges, suspensions bridges, and cable-stayed bridges. Bridges are typically made of concrete, steel, fibers, reinforced polymers, and stainless steel.