bridges v. elevated sections

[naive]

Does anyone know why some parts of the road are referred to as bridges and others as elevated sections or flyovers? They all seem to be the same thing to me but I stand to be corrected

Thanks :)

[sddsddean]

An 'elevated section' is effectively a long bridge, but as bridges are normally stand alone structures, long sections of motorway etc are referred to as elevated sections rather than a bridge. Obvious examples are M6 J5-6 and M4 in West London. A flyover is normally a bridge that has been constructed to alleviate a traffic congestion problem such as a roundabout; it 'flies over' the congestion, but at the end of the day they are all bridges.