| Revision as of 15:15, 10 December 2004 editRadagast (talk | contribs)Extended confirmed users, Pending changes reviewers10,976 edits Specific definition, reasoning, examles, image← Previous edit | Revision as of 22:36, 14 December 2004 edit undo129.10.15.53 (talk) gets its name from aqueductNext edit → | ||
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| ]'s ] bridges the ] valley; road traffic uses the upper deck, ] traffic uses the lower deck.]] A '''viaduct''' is a ] that connects points of equal height in a landscape, usually by bridging a river ] or other eroded opening in an otherwise flat area. Often such valleys have roads descending either side (with a small bridge over the river, where necessary) that become inadequate for the traffic load, necessitating a viaduct for through traffic. Such bridges also lend themselves for use by ] traffic, which requires straighter and flatter roadways. | ]'s ] bridges the ] valley; road traffic uses the upper deck, ] traffic uses the lower deck.]] A '''viaduct''' is a ] that connects points of equal height in a landscape, usually by bridging a river ] or other eroded opening in an otherwise flat area. Often such valleys have roads descending either side (with a small bridge over the river, where necessary) that become inadequate for the traffic load, necessitating a viaduct for through traffic. Such bridges also lend themselves for use by ] traffic, which requires straighter and flatter roadways. It gets its name from an analogy with ], which must also be practically flat, while a bridge for people, pack animals, or non-rail vehicles can be hump-backed and gain a structural advantage (i.e., less material or design sophistication needed) from that shape. | ||
| Some well-known viaducts include: | Some well-known viaducts include: | ||
Revision as of 22:36, 14 December 2004
A viaduct is a bridge that connects points of equal height in a landscape, usually by bridging a river valley or other eroded opening in an otherwise flat area. Often such valleys have roads descending either side (with a small bridge over the river, where necessary) that become inadequate for the traffic load, necessitating a viaduct for through traffic. Such bridges also lend themselves for use by rail traffic, which requires straighter and flatter roadways. It gets its name from an analogy with aqueduct, which must also be practically flat, while a bridge for people, pack animals, or non-rail vehicles can be hump-backed and gain a structural advantage (i.e., less material or design sophistication needed) from that shape.
Some well-known viaducts include:
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