A viaduct is a bridge composed of several small spans. The term viaduct is derived from the Latin via for road and ducere to lead something. However, the Ancient Romans didn't use that term per se; it's 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 or both, as in the viaduct in Faribault, Minnesota. Many viaducts over land connect points of similar height in… (More on Viaduct)