by george matthews
Even a straight shot from NYC to Paris at 300MPH would be 12 hours! How would you even maintain such a system? 6 hours for MOW workers to reach the center. And that's assuming the MOW equipment could even attain such speeds as high as 300MPH.Remember that all modern tunnels (such as those through the Alps) have a safety tunnel as well as the running tunnel(s). Eurotunnel has a third tunnel which can be used for many purposes. It has been used to rescue people stuck on trains, and in case of two fires.
Maintenance of Eurotunnel makes use of the fact there are six segments of tunnel, accessible via the two crossovers.
That said, I think talk of these very long tunnels is pure fantasy. I think a Behring tunnel is possible, but not likely. I don't think any other long tunnels are going to happen.