In contrast, the 2 mile long SR-99 tunnel under Seattle cost $3.3 billion, whereas this is 55km for $11 billion. I.e. in Europe they're tunnelling for $0.2 billion per km compered to the US at $0.97 billion per km.
Many moons ago I did the "drunken stumble around europe" thing with a friend. We tried to stick to trains wherever practical, but crossing the alps by rail was something like 20x the cost of the same trip by budget air.
We keep getting guilted for flying everywhere, but projects like this are needed to make the alternatives practical.
From the title I expected this to be about the Fehmarntunnel between Denmark and Germany. After all, there are already tunnels through the Alps. Also, this is the B1M, which isn't that good.
How long would this last in a conflict with Russia.
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What a horrible clickbait title.
They're digging a 64km long tunnel through the Alps - so technically it does enable a connection of Scandinavia to the Mediterranean. But it's not a tunnel from Scandinavia all the way to the Mediterranean like the title implies.
You could also say it connects Latvia to South Africa ...