Congestion and curves – challenges in constructing HS2 in the Chilterns

Not far outside London, two railway viaducts are being built for the HS2 railway, which will pass through one of the more congested patches of the Chiltern Hills.The railway passes along a long natural valley that runs through the Chiltern Hills, a legacy of the last Ice Age when glaciers carved a path through the hills. As a very convenient route for humans to get through the hills, it’s lined with towns, roads, and railways, making it a complicated area to fit another railway into.
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