Re: [General] Bridge terminology

["Bernard Smith" <epping.smiths@NOSPAMbigpond.com>]

"Ronald BESDANSKY" <ronbest@bigpond.com> wrote in message
_e2h6.21423$65.109719@newsfeeds.bigpond.com">news:_e2h6.21423$65.109719@newsfeeds.bigpond.com...
> If a bridge carries a railway OVER a road, watercourse etc, it's an
> UNDERBRIDGE. If it carries a road etc over the railway, it's an
OVERBRIDGE.
> What about a bridge which carries on railway over another, e.g.
Botany Line
> over Illawarra at Sydenham (NSW) and Long Cove Viaduct (NSW western
line)???
> Is it an overbridge on the lower line and an underbridge on the
higher??

They are underbridges, because if you stand on the bridge the other
line is *under* you.

(If you stand on the other line, you are not on a bridge.)