What is a train overpass called?

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.



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Highway-railroad grade crossings are intersections where a highway crosses a railroad at-grade. They are also called level crossings in other countries such as Canada, Australia, and the United Kingdom.

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Railroad ties are rectangular pieces of wood with specified dimensions that are used to hold steel rails apart by a fixed distance in track.

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There are two types of crossings–private and public. Private crossings are not required to have advance signs or other markings and are found on roadways not maintained by public authority.

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