[JPKab]

America lacks the population density, even in the northeastern corridor (which I have ridden by the way, DC to Boston) to make the investment make sense. By the way, the price was too high, and it kept having to slow down near every city.

Tokyo to Osaka, for instance, is a relatively short distance (300 miles), and both cities are larger than any city in the US, with Nagoya at the half-way point. The quantity of humans that can serve is an order of magnitude higher than in the same distance in the USA, even on the eastern seaboard.

It just doesn't work for us. The dramatically reduced costs of infrastructure for constructing mounted tubes on pylons, with each section being a fungible, mass produced item, makes rail obsolete. Understood that a lot of the tech is "unproven", but it's too promising to let curmudgeons focus on the stupid, expensive fool's errand of high-speed rail in the US because they are too unimaginative to see what's available to us in the future.

[soyiuz]

> The dramatically reduced costs of infrastructure for constructing mounted tubes on pylons, with each section being a fungible, mass produced item, makes rail obsolete.

This makes no sense. The "mounted tubes on pylons" contain rails inside and therefore are MORE not less expensive than just "rails mounted on pylons," which we already have. A more complex rail does not make simple rail obsolete. Nor does it beat it on fungibility, cost, or mass production. Where are you getting these "dramatically reduced costs"?

[djrogers]

> and both cities are larger than any city in the US,

While Tokyo is more populous (I assume that's what you mean by 'larger', if not Houston and LA have a few words for you) than any city here in the US, Osaka is not - however New York, Los Angeles, and Chicago are far more spread out than could ever be possible in Japan.