Viaduct vs. Overpass — What's the Difference?

A viaduct is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide valley, road, river, or other low-lying terrain features and obstacles.

An overpass (called an overbridge or flyover in the United Kingdom and some other Commonwealth countries) is a bridge, road, railway or similar structure that crosses over another road or railway. An overpass and underpass together form a grade separation.

A long bridge-like structure, typically a series of arches, carrying a road or railway across a valley or other low ground.

A passage, roadway, or bridge that crosses above another roadway or thoroughfare.

A series of spans or arches used to carry a road or railroad over a wide valley or over other roads or railroads.

To pass over or across; traverse.

(transport) A bridge with several spans that carries road or rail traffic over a valley or other obstacles.

To go beyond; surpass.

A structure of considerable magnitude, usually with arches or supported on trestles, for carrying a road, as a railroad, high above the ground or water; a bridge; especially, one for crossing a valley or a gorge. Cf. Trestlework.

To go over (a limit or boundary); transgress.

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

To overlook or disregard.

A section of a road or path that crosses over an obstacle, especially another road, railway, etc.

To pass above something, as when flying or moving on a higher road.

(transitive) To exceed, overstep, or transcend a limit, threshold, or goal.

(transitive) To disregard, skip, or miss something.

To go over or beyond; to cross; as, to overpass a river; to overpass limits.

To pass above; - of roadways and other paths; as, the highway overpasses the railroad tracks.

To pass over; to omit; to overlook; to disregard.

To surpass; to excel.

To pass over, away, or off.

A road or other pathway which passes over another road, railroad, or other path; as, he stopped on the street under the railroad overpass.

Bridge formed by the upper level of a crossing of two highways at different levels;