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.
To exceed, overstep, or transcend a limit, threshold, or goal.
To disregard, skip, or miss something.
A commuter rail system that combines aspects of an interurban railway with those of a subway, using a menagerie of pathways such as viaduct, tunnel, beam, cut and cover, trench, at grade, and others.