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| 7 | Celebrate the centenary of London Underground’s Camden Junction tunnels | ----------- | |
| ianVisits | 2024-04-16 15:40 | ????0? | |
| The junction owes its existence to a number of factors coming together around the same time, but the two main reasons were a project to enlarge the smaller tunnels on the Bank branch of the Northern line and extensions of the railway northwards from Camden. These two projects gave birth to the desire for a junction allowing Northern line trains to use either branch of the railway and cross between them.Normally, if you join two railways together, you’d build a flat junction, with the tracks merging. If you do that in a tunnel, you just build a slightly larger tunnel around the new junction to allow trains to cross between them. For example, the Elizabeth line’s junction just to the east of Whitechapel where the line splits into two, is a simple railway junction in a large cavern.However, for the Camden Junction, that wasn’t going to be possible because the two tube lines were already busy, and a wide set of several flat junctions wouldn’t be able to handle the number of trains passing across them — there simply wouldn’t be enough time between one train on one side crossing and another train on another side to also cross over to the other side.In December 1923, the staff magazine[2] reported that the Northern line to Hendon was to cost over £500,000, while the total cost of the extension from Golders Green to Edgware, the new highway between Camden Town and Euston, the reconstruction of the City & South London Railway, and new rolling stock and car sheds would be over £5million. Nearly 200 carriages were being delivered, with the first going into service on the Hampstead line.Works were progressing well enough that later that same month[3], Lord Ashfield was able to give a speech where he confirmed the Camden junction was on target to open the following month. Along with the later extensions to Edgware and Morden, he said that these projects would “bring to a conclusion a period of rapid expansion such as London has not experienced for many years” -- ???????? | |||
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