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Aldwych branch signalling

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Aldwych branch signalling 18/06/2019 at 22:32 #119045
clive
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1924 posts
An acquaintance asked me a question the other day about how the Aldwych branch of the Piccadilly Line was signalled. It turns out I don't have any diagrams at all relating to it. Does anyone have a basic diagram of the branch and the junction with the main route, just showing where the signals are? (Though more detail is always welcome.)
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Aldwych branch signalling 18/06/2019 at 22:46 #119046
Edgemaster
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Harsig is always a good resource for LU signal diagrams. There's a 1931 Picadilly line diagram available, which I doubt has had much changed in the meantime in the central tunnel sections.
Last edited: 18/06/2019 at 22:50 by Edgemaster
Reason: None given

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Aldwych branch signalling 19/06/2019 at 15:57 #119052
clive
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Hmm, I'd forgotten about Harsig.

Someone else has sent me some stuff which shows that it *has* changed since then, two or three times.

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Aldwych branch signalling 19/06/2019 at 16:28 #119054
TUT
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How contemporary were you hoping for? Obviously the branch is not in regular use anymore. I understand it's used for filming, and there is a train down there which they can move. In connection with this, I think it is still possible to get trains on and off the branch, although I think that might change if/when Holborn is remodelled. I'm a bit out of the loop...

Here's a picture of Earl's Court control room from 2005.

http://www.anorakheaven.com/photos/ect_cr34.jpg

Piccadilly line signalling is, I understand, in the process of being moved to a new control room as part of the Piccadilly Interim Control Upgrade. That might even already be complete. Out of the loop, as I say. The key point is the area may no longer be controlled from Earl's Court as we type, but I don't think the signals themselves have changed as part of the upgrade.

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Aldwych branch signalling 19/06/2019 at 20:25 #119059
clive
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Thanks. That matches what I've got and illuminates some details.
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