Thread: Northern line signals
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Old September 16th 15, 08:50 AM posted to uk.transport.london
Mike Bristow Mike Bristow is offline
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First recorded activity at LondonBanter: Jul 2003
Posts: 464
Default 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.


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Mike Bristow

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