Northern line signals
 

Just wondering why all the signals are bagged on the northern. I realise
its now running ATO but why not just disconnect the old signals entirely
so they're off?

--
Spud

Northern line signals
 

On 16/09/2015 09:23, y wrote:
Just wondering why all the signals are bagged on the northern. I realise
its now running ATO but why not just disconnect the old signals entirely
so they're off?

--
Spud

Its the same on the Jubilee.

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

Northern line signals
 

In article ,
y wrote:
Just wondering why all the signals are bagged on the northern. I realise
its now running ATO but why not just disconnect the old signals entirely
so they're off?

I expect that is because a signal that is bagged is clearly
decommisioned (or not yet commisioned), but a signal that is unlit
is required to be treated as a red signal - becuase that's the safe
thing to do if the bulb blows.


--
Mike Bristow

Northern line signals
 

On Wed, 16 Sep 2015 09:50:40 +0100
Mike Bristow wrote:
In article ,
y wrote:
Just wondering why all the signals are bagged on the northern. I realise
its now running ATO but why not just disconnect the old signals entirely
so they're off?

I expect that is because a signal that is bagged is clearly
decommisioned (or not yet commisioned), but a signal that is unlit
is required to be treated as a red signal - becuase that's the safe
thing to do if the bulb blows.

Sure - if signals are still being used. But they're not and all the drivers
know it. Besides which if the train is on ATO what the driver thinks is
irrelevant because the train will just sail past anyway.

--
Spud

Northern line signals
 

On 16.09.15 10:34, y wrote:
On Wed, 16 Sep 2015 09:50:40 +0100
Mike Bristow wrote:
In article ,
y wrote:
Just wondering why all the signals are bagged on the northern. I realise
its now running ATO but why not just disconnect the old signals entirely
so they're off?

I expect that is because a signal that is bagged is clearly
decommisioned (or not yet commisioned), but a signal that is unlit
is required to be treated as a red signal - becuase that's the safe
thing to do if the bulb blows.

Sure - if signals are still being used. But they're not and all the drivers
know it. Besides which if the train is on ATO what the driver thinks is
irrelevant because the train will just sail past anyway.

--
Spud


Perhaps they think that there are too many variables and that it is just
better to play it safe in any event?

Northern line signals
 

On Wed, 16 Sep 2015 12:22:09 +0100
" wrote:
On 16.09.15 10:34, y wrote:
On Wed, 16 Sep 2015 09:50:40 +0100
Mike Bristow wrote:
In article ,
y wrote:
Just wondering why all the signals are bagged on the northern. I realise
its now running ATO but why not just disconnect the old signals entirely
so they're off?

I expect that is because a signal that is bagged is clearly
decommisioned (or not yet commisioned), but a signal that is unlit
is required to be treated as a red signal - becuase that's the safe
thing to do if the bulb blows.

Sure - if signals are still being used. But they're not and all the drivers
know it. Besides which if the train is on ATO what the driver thinks is
irrelevant because the train will just sail past anyway.

--
Spud


Perhaps they think that there are too many variables and that it is just
better to play it safe in any event?

Could be I suppose. Seems a lot of effort tho since they'll switch off the
signals eventually so why not do it immediately. Unless its for a fallback
system case the ATO throws a massive wobbly that can't be fixed quickly.

--
Spud

Northern line signals
 

In message , y wrote:
Besides which if the train is on ATO what the driver thinks is
irrelevant because the train will just sail past anyway.

On LU, if a train passes a red signal on ATO the driver is required to
put the train into an emergency stop.

Signals intended only to be passed by trains on ATO show white.

--
Clive D.W. Feather | Home:
Mobile: +44 7973 377646 | Web: http://www.davros.org
Please reply to the Reply-To address, which is:

Northern line signals
 

On 16.09.15 22:44, Clive D. W. Feather wrote:
In message , y wrote:
Besides which if the train is on ATO what the driver thinks is
irrelevant because the train will just sail past anyway.

On LU, if a train passes a red signal on ATO the driver is required to
put the train into an emergency stop.

Signals intended only to be passed by trains on ATO show white.

That's on the Central and Victoria, however, is it not?

Northern line signals
 

On Wed, 16 Sep 2015 22:44:59 +0100
"Clive D. W. Feather" wrote:
In message , y wrote:
Besides which if the train is on ATO what the driver thinks is
irrelevant because the train will just sail past anyway.

On LU, if a train passes a red signal on ATO the driver is required to
put the train into an emergency stop.

Signals intended only to be passed by trains on ATO show white.

Yes. Except if they were off they wouldn't be showing any aspect anyway would
they.

--
Spud

Northern line signals
 

On 17.09.15 9:35, y wrote:
On Wed, 16 Sep 2015 22:44:59 +0100
"Clive D. W. Feather" wrote:
In message , y wrote:
Besides which if the train is on ATO what the driver thinks is
irrelevant because the train will just sail past anyway.

On LU, if a train passes a red signal on ATO the driver is required to
put the train into an emergency stop.

Signals intended only to be passed by trains on ATO show white.

Yes. Except if they were off they wouldn't be showing any aspect anyway would
they.

--
Spud

And any driver worth his salt would would stop the train, call up his
control centre and ask WTF, ATO or not, in the case of a dark signal

It could be that there may have been some changes to the route or some
temporary changes that either the driver missed or that LUL failed to
properly communicate to train crews.

It's not impossible.