Comment by tim333

While this looks very cool I'm not sure how the economics would work out. The UK-France channel tunnel for instance which transports cars fairly rapidly through a 31 mile tunnel cost $21 bn to build and the tickets aren't cheap (~£100 single) which works if the competition is a ferry but may not if it's just driving a bit. Maybe Musk will figure how to bring down the cost a few times.

I would have thought semi self driving cars platooning would be a cheaper and more practical way to beat the jams.