The US might have a low population density if you just take the population divided by the territory but it's obviously all in the geography and clusters and ave

The US might have a low population density if you just take the population divided by the territory but it's obviously all in the geography and clusters and averaging is not helpful. The US has several population clusters[1] and for example the Northeast corridor in particular with 50 million inhabitants is a reasonably good target for a high speed rail network. [1]https://en.wikipedia.org/wiki/Northeast_megalopolis#/media/File:MapofEmergingUSMegaregions.png https://en.wikipedia.org/wiki/Northeast_megalopolis#/media/F...