Re: extra Rails?

["Ronald BESDANSKY" <ronbest@bigpond.com>]

"Ted Gay" <tedgay@bigpond.com> wrote in message
sMwd6.12963$65.69936@newsfeeds.bigpond.com">news:sMwd6.12963$65.69936@newsfeeds.bigpond.com...
>
> "jjjim" <jjjim@bigpond.com> wrote in message
> 3A769296.CD2A485C@bigpond.com">news:3A769296.CD2A485C@bigpond.com...
> > ON what apears to ONLY be on sections of Track that are going over some
> > sort of bridge (say a creek  or over a road)  Are a second pair of Rails
> > Right in the center of the track,  right next to eachother,  , say about
> > 20cm apart  ,  I was wondering what there purpose was?.   I had an idea
> > that maybe it was a saftey thing in the case a train was to derail on
> > the bridge, helping to  prevent it from running right off the track..
> > thus off the bridge and crashing into the creek / Road below!  which
> > would no doubt cause  massive carnage  ,  would this be the reason, or
> > am i way off ;)
> >
>
> Yes, check rails, not always so close together, can be close to running
> rails.  Also used where rail/tram line passes under a building, shopping
> centre, on the tram line under Star City Casino (Sydney Metro Light Rail).
>
> Ted

Which reminds me - noticed the other day that they have check rails for the
OUTER rail (as well as the inner) on the curve between John Street Square
and Star City - anybody know why?