a road, railroad, or path that goes over a river, over another road, etc., and the structure that supports it
a piece of wood or metal fixed to the side of an upright post or a wall and used for supporting something such as a bridge
British an overpass that takes one road above another road
American a structure like a bridge that allows one road to pass above another road. The British word is flyover.
toll bridge noun
a bridge that you have to pay to drive across