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Old May 11th, 2011, 11:03 PM   #2081
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Originally Posted by lafreak84 View Post
But why the Northern line? Why not Victoria from Pimlico to Battersea or better yet Central from Clapham Junction to Nine Elms and possible future connection to Kennington (Northern)? I'd like to know the reason behind the decision because it doesn't make sense to me as it is.

Or why not invest in expanding current lines and perhaps new W2E line in the south because Croydon is the only city in south London that has Tube connections. Extending Northern from Mordon to Epsom would be much more useful because Stockwell which serves both Northern and Victoria is 10min walk from Nine Elms, same for Clapham to Battersea, even less than 10min.
Extending the Northern Line makes a lot of sense. To understand why, you need to understand the layout at Kennington. There used to be two tube lines, the Great Northern and the Hamstead Tube. There are four platforms at Kennington - the two middle platforms serve the Northern Line via City branch, the two outer platforms serve the Northern Line via Charing Cross branch - these last two platforms are connected by a large radius loop so trains can turn around without reversing.

The extension to Nine Elms would involve new tunnels branching off this loop - so essentially all trains from the Charing Cross branch would run to Nine Elms, instead of terminating at Kennington or running down to Morden.

Here's a drawing of Kennington Station looking south. The southbound tunnel to Nine Elms would branch off from the return loop (near trhe end of the word "...Trains") with the northbound tunnel joining to the right. This would fit nicely with TFL plans to split the Northern Line (Nine-Elms to Edgeware (Hampstead Line?) and Morden to High Barnett and Mill Hill East (Great Northern Line) once they solve capacity issues at Camden Town for interchanging passengers.

Source: Husk.org
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Old May 12th, 2011, 02:15 PM   #2082
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What a fantastic sketch!
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Old May 12th, 2011, 09:19 PM   #2083
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Old May 12th, 2011, 11:29 PM   #2084
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What a fantastic sketch!
It's interesting that LU evidently used to use 'up' and 'down' to label lines, as NR still do today. I don't really know how it would have worked... As London-centric as it sounds, on NR 'up' denotes the London-bound track and 'down' the country-bound track... Easy to remember as "Up to London, down to the country"... but by very nature every LU line traverses London, so a line which is heading into London ends up heading out of London further down the line so I don't understand how they were labelled unless they switched from 'up' to 'down' or vice versa at a point in Central London.

In this diagram the Morden-bound platforms are labelled 'down' and London-bound 'up' as you'd expect... but at East Finchley there was a junction between the Northern Line and the former GNR branches to Edgware and High Barnet, where if the northbound track remained 'up', it would be joining the 'down' BR track at East Finchley which is an anomaly.

This is why LU uses westbound / eastbound / northbound / southbound and not up / down today. I wonder when it changed and how it used to work?
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Old May 13th, 2011, 01:44 AM   #2085
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Underground lines are completely horizontal are they?
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Old May 13th, 2011, 12:52 PM   #2086
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Old May 13th, 2011, 07:01 PM   #2087
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Thanks a lot for the explanation. Are there any other expansion plans?
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Old May 13th, 2011, 11:21 PM   #2088
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Old May 13th, 2011, 11:55 PM   #2089
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Underground lines are completely horizontal are they?
???

If you're referring to the 'up' and 'down' terminology... that has nothing to do with whether the lines are going up or down gradients... Of course LU lines have plenty of very steep gradients, bear in mind the topography of London varies from marginally above sea level at The Thames (the tube crossings beneath are well below sea level), to over 150m track height on the Metropolitan Line in the Chiltern hills...
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Old May 14th, 2011, 01:45 AM   #2090
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Not much over 150m, mind you. Amersham station is about 500ft ASL, and the reversing sidings are about 15ft higher, if that (Chesham is lower, being in a bowl)
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Old May 14th, 2011, 04:00 PM   #2091
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@Tubeman: of course I know the terminology has nothing to do with that. I just had the impression it's more difficult to feel the actual ups and downs while underground.
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Old May 15th, 2011, 03:32 AM   #2092
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Old May 15th, 2011, 07:24 PM   #2093
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Old May 15th, 2011, 11:25 PM   #2094
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Old May 16th, 2011, 12:31 AM   #2095
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Old May 17th, 2011, 09:40 AM   #2096
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It was only relatively recently that I realised that the current Jubilee line used to be a part of the bakerloo. It's great to see it in a map. It also explains Baker Street's great interchange.
What you don't see on the tube maps is the great sweeping curve of the Jubilee Line as it approaches Baker Street from Green Park. Leaving Green Park NB, the tunnels turn east and then begin a large radius curve so they end up parallel to the Bakerloo platforms. This allows cross-platform SB Bakerloo - SB Jubilee.

In reality, the Jubilee tunnels get very close to Regent Street Underground Station (on the Bakerloo) - on a tube map and even a map of London showing the route of the lines, the Jubilee appears to run in a straight line from Green Park to Baker Street.

Baker Street and actual tunnel alignments

source: fridaynightsmoke.co.uk
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Old May 17th, 2011, 11:42 AM   #2097
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Old May 17th, 2011, 08:56 PM   #2098
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Old May 18th, 2011, 12:39 AM   #2099
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Old May 18th, 2011, 03:13 AM   #2100
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Is it possible to reduce the number of videos to news-related ones? I open this thread always hoping to find actual stuff about the LU, not to watch videos which i can find on youtube as well. Thanks in forward!
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