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The magic of through running
By weaving together existing railway lines, some cities can get the best transit in the world
Even today, the outer reaches of the Central Line extensions go to places like Grange Hill and Theydon Bois, which are ‘mirror towns’: on one side of the tracks there is suburban development, on the other there are just fields. It was assumed in the 1930s that suburbia would rapidly spring up on the fields next to the stations, but in many cases there are streets that, quite literally, end when their builders were conscripted or redirected into war industries in 1939, and were never finished due to the Green Belt. Although this brought immediate benefits, it was done cheaply, and 30 years later London had to spend six billion pounds on untangling track layouts, rebuilding stations and resignaling the route to get the most out of the Snow Hill Tunnel.
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