3 ms·
> which is a major feat of alignment as it was tunneled from both directions to meet in the middle. So was crossrail
by easytiger 11y ago
> which is a major feat of alignment as it was tunneled from both directions to meet in the middle.
So was crossrail
- lmm 11y agoThe two ends of Crossrail "met" in a big prebuilt cavern in Farringdon. Still impressive, but not quite on the level of joining up two tunnels under the sea.