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The Akashi Kaikyō Bridge in Japan, currently the world's longest suspension span.
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The Siosepol bridge over Zayandeh River is an example of Safavid dynasty (1502–1722) bridge design. Esfahan, Iran

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A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that all serve unique purposes and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it.

Bridge sections
Intro  Etymology  History  Types of bridges  Aesthetics  Bridge maintenance  Bridge failures  Bridge monitoring  Visual index  See also  References  Further reading  External links  

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