Yesterday CityLab wrote a fascinating piece on the plans to build a new tunnel on the seabed between Denmark and Germany. The “Fehmarn Belt Fixed Link” looks set to reduce travel times between Copenhagen and Berlin by train from 5 hours to just 2.
But what’s really interesting is the technological challenges in how they plan to build it. Check out the above video which gives a good overview. In essence, the plan is not to dig a tunnel underneath the sea bed, like with the Channel Tunnel, but is instead to pre-fabricate slices of tunnel on the coast, before floating them out to the middle of the sea and dropping them to the sea floor.
The resulting tunnel will have both road and train connections – and is an absolutely astonishing feat of engineering. Humans are amazing.