Duan, Lian California Department of Transportation, Carmichael, California.
- Bascule bridge
- Vertical-lift bridge
- Swing bridge
- Bridge operation and control
- Additional Readings
A bridge that allows the position of the deck structure (girders or trusses) to be readily changed either horizontally or vertically to permit marine traffic to pass through the waterway it crosses. Modern movable bridges have been developed to meet the challenges of railway and highway systems. The three most common types are bascule, vertical-lift, and swing. Other types, such as retractable, jackknife, reticulated, and floating, are not common. Movable bridges are also classified as to the character of their main deck structures; that is, girder (beam) spans or truss spans. See also: Beam; Bridge; Truss
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