Information AboutViaduct |
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at Porthkerry Park near Cardiff International Airport , Barry, Wales ]] lies on the Settle-Carlisle Railway in England .]] , spanning the Oresund strait between Denmark and Sweden , uses a Cable-stayed span and a Tunnel section in addition to the viaduct to avoid blocking shipping traffic.]] in Seattle allows a high traffic volume to share a limited space.]] in France is the tallest viaduct in the world.]] A viaduct is a Bridge composed of several small spans. The term ''viaduct'' is derived from the Latin ''via'' for road and ''duco'' to lead something. However the Ancient Romans did not use that term per se, it is a modern derivation from an analogy with Aqueduct . Like the Roman aqueducts, many early viaducts comprised a series of arches of roughly equal length. Viaducts may span land or water. Many viaducts over land connect points of similar height in a landscape, usually by bridging a river traffic, which requires straighter and flatter routes.Davidsen, Judith (April 1993) "A new "lite" rail viaduct formula: Norman Foster designs a rapid-transit viaduct for Rennes, France" ''Architectural Record'' 181(4): p.26; Viaducts over water are often combined with other types of bridges or tunnels to cross navigable waters. The viaduct sections, while less expensive to design and build than tunnels or bridges with larger spans, typically lack sufficient horizontal and vertical clearance for large ships. In Romance Languages , the word ''viaduct'' refers to a bridge which spans only land. A bridge spanning water is called ''ponte''. REFERENCES SEE ALSO
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