Definition

Noun: A viaduct is a long bridge-like structure, typically consisting of a series of arches or spans supported by tall piers or towers, used to carry a road or railway across a valley, gorge, or other low-lying ground.

Usage

A viaduct is a specific type of bridge designed for transportation infrastructure. It is characterized by its length and its use of multiple, relatively short spans (often arches) to traverse uneven terrain without requiring a single, massive span. It is distinct from a simple bridge, which may cross a river or road with fewer supports.

Examples

• The old railway viaduct crosses the entire river valley.
• The new highway project includes a long viaduct to connect the two hills.
• Engineers are inspecting the stone arches of the historic viaduct.

Advanced Usage

• "Railway viaduct": A viaduct specifically built to carry a railroad line.
  • The disused railway viaduct has been converted into a public walkway.
• "Elevated viaduct": A viaduct built in an urban area to carry traffic above ground level.
  • The city's traffic flows smoothly on the elevated viaduct.

Variants and Related Words

• Aqueduct (noun): A structure, similar in form to a viaduct, designed to carry water over a long distance.
  • The ancient Romans built impressive aqueducts.
• Overpass (noun): A bridge that carries one road or railway over another. While similar, an overpass is generally shorter and crosses another route, not necessarily a valley.

Synonyms

• Bridge (noun): A more general term for a structure carrying a pathway over an obstacle.
• Flyover (noun, chiefly British): A bridge that carries one road over another; similar to an overpass.

Antonyms

• Tunnel (noun): An underground or underwater passage, as opposed to a structure built above ground.
• Underpass (noun): A road or pedestrian passage that goes underneath another road or railway.

Noun

1. bridge consisting of a series of arches supported by piers used to carry a road (or railroad) over a valley