The beam bridge is the most common bridge. It is usually used to span shorter distances and is commonly found on local roads. A beam bridge is made with large supports on the edges and a heavy beam crossing over water, a ditch, or other open space. Over the sturdy beam, there are boards, metal, or most commonly a layer of concrete. The bridge road surface is level with the road, making it very strong. Beam bridges are used to span no more than 250 feet.

This beam bridge is located over the Pleasant Spring Creek in Perkasie, PA (next to the Dairy Queen).

The cantilever bridge is a bridge formed by two projecting beams or trusses that are joined in the center by a connecting member and are supported on piers that are anchored by balancing members. In other words, there are two beams with a tower that holds them together in the middle, and there are weights on each end to balance it.

This cantilever bridge over the Delaware River is located at Easton, PA and Phillipsburg, NJ

Draw bridges are used to span a water source. Draw bridges can raise or are open in the middle and can draw back to two sides - thus the name, draw bridge. These bridges raise so tall ships can pass through them. They generally aren't very high and they only span short distances, or only a small portion of the bridge raises. A famous draw bridge is London Bridge, in London, England.

This draw bridge is located between Cape May and Wildwood, New Jersey.

A truss bridge is basically a fancy beam bridge. The truss is a triangular design used for support to hold up more weight and span more distance. The triangular supports span across the top sides of the bridge, and sometimes trusses are part of the under structure of a truss bridge.

This truss bridge spans the Delaware River between Upper Black Eddy, PA and Milford, NJ.