"Bridges are an essential component in the development of an effective transportation system. Bridges carry autos, trucks, railroad locomotives, railroad cars and occasionally an airplane across obstacles such as rivers, highways, gorges, ravines, etc. Bridges facilitate movement because they provide a relatively straight and level roadway that can be traversed at high speed. When a bridge fails or even when it is repaired, we are reminded of its importance by the long traffic delays encountered." p 1-1

ARCH BRIDGE

CANTILEVER BRIDGE

GIRDER BRIDGE

SUSPENSION BRIDGE

TRUSS

TRUSS BRIDGE