Re: NRC <> Brisbane to Sydney safeworking.

[krel4203@netconnect.com.au (Krel )]

On Sun, 15 Nov 1998 22:11:58 +1100, "David Proctor"
<daproc.spambait@umpires.com> wrote:

>Krel wrote in message <364eb105.6864419@news.netconnect.com.au>...
>
>>This happen already in Victoria. It is called Section Authority
>>working. The train control graph is electronic; it will not allow
>>"cornfield meets". The train controller issues an electronic authority
>>via secure radio is the following format:-
>
>
>[...snip...]
>
>>On arrival at the home signal at the facing points you stop. Insert a
>>special key into a keylock that puts the main line signal back to red,
>>motors the points and then clears the signal for the loop.
>
>
>Why not just having trailable points like they do in Queensland - all trains
>in the Up direction go onto one road (loop or main, not sure which) all
>trains in down direction go into the other? The points are set up so that
>when a train leaves (against the points) they revert to their normal
>position. No need for keying then.
>
The idea was to avoid slowing trains down when no cross is involved.
The cost involved in both time and dollars in slowing 1500 metres of
train and then getting back up to speed is considerable. On some
secondary lines trailable points are used.

Cheers

Krel


>>Does this help or confuse??
>
>
>Seems overly complicated. But then, that is the way of Australian railways -
>why use 5 rules when you can use 5,237.
>
>David "The Doctor" Proctor
>daproc.spambait@umpires.com
>
>

All's well that ends.