overpass [overpasses](A section of a road or path that crosses over an obstacle, especially another road, railway, etc) noun [UK: ˈəʊv.ə.pɑːs] [US: ˈoʊv.r̩.pɑːs]
viaduct [viaducts](bridge with several spans that carries road or rail traffic over a valley) noun [UK: ˈvaɪə.dʌkt] [US: ˈvaɪə.dəkt]