> A big part of the cost and complexity of Crossrail isn't the tunnelling but rather the (re)builds of the stations, the remodelling and reconstruction of the a

> A big part of the cost and complexity of Crossrail isn't the tunnelling but rather the (re)builds of the stations, the remodelling and reconstruction of the above-ground street areas to increase capacity there too, and many other subtleties that people don't tend to think about. The BBC's documentaries on the Crossrail are great at showing all of the complexity of building the thing and dealing with historic buildings, super-hard brickwork, archaeological discoveries, concert halls and more. https://www.youtube.com/watch?v=SD77jr6M6cs https://www.youtube.com/watch?v=SD77jr6M6cs