Comment Re:No. (Score 1) 153
Look at Japan's new maglev line. It's 90% tunnels through mountains. Goes through densely populated cities to reach the stations. More than twice as fast as TFA is speculating about, at 600 KPH / 370 MPH.
Cities were competing to get mid-way stations added. In the last couple of decades they also built the Tsukuba Express line, and a number of new towns along it, for commuters to live in and access central Tokyo. Joined up planning, and creating new opportunities.
They don't need multi-track either, their trains are reliable, even with the earthquakes and extreme weather.