Re: Signalling queries

["B." <b.spammed@four12.net>]

"Eddie Oliver" <eoliver@efs.mq.edu.au> wrote in message
3B248DF0.94D39ABF@efs.mq.edu.au">news:3B248DF0.94D39ABF@efs.mq.edu.au...
> "B." wrote:

>> Train Order:
>>  signals etc...  The disadvantage is that there is a lot of reliance
>> on humans not making a big cock up, which they did quite spectacularly
>> at Mt Christie for example.

> Yes, but the NSW version of train order working has many
> software/hardware safeguards built in to minimise the likelihood of
> such an incident - e.g. the location of a train is continually
> monitored by GPS.

What is the precise method of doing this?  Does the 'office' end of the
system poll each train for it's location every x minutes?  Is this a
function of the Train Radio system, or is there a seperate system that just
uses the Train Radio as transport?

>> Basically with a plain track circuit the track is broken up into
>> sections with insulated joints.

> Except in jointless track circuits where there are not insulated
> joints.

I was trying to keep the explanation simple.  Whether the track is jointless
or not is only really an issue for the Signals people and the Track people.

Having said that, the easiest track circuits to adjust are the Safetran
IPI's.  Press the little black button twice with a shunt just outside the
track leads, and it's finished.

--
B.

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