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There are three main bridge areas which include all the basic components of bridge: Foundation, Substructure, and Superstructure. Bridges are complex structures, and since they can be made with many different materials and truss types, their components are almost too numerous to count. Here you can get informed about basic bridge parts and components.
Modern cantilever bridge is one of the safest bridge variants because it can carry largest load. Since the dawn of the modern bridge, in 19th century, they were used to carry railroads.
Culvert is a structure, usually of tunnel type that carries a stream or open drain under a road, railroad or any other obstruction from one side to the other side. Materials which can be used for culverts include a reinforced concrete, pipe or other material that have good performance when is embedded and surrounded by soil.
Beam bridge is the oldest and the simplest type of the bridge. It appeared when the first tree fell over the stream and a human crossed it. Today we still make bridges that use similar principle.