[m_mueller]

US has about the same population density as Switzerland in multiple areas that are at least as large: LA, Bay area and especially Philadelphia-DC-NYC-Boston.

So.. how does size exactly stop the US from having the to-date most efficient mass transport? I'm not talking LA-NYC, noone is gonna do that until someone builds vacuum tubes. First you need good local and regional travel.

[allendoerfer]

Switzerland also has to build tunnels, because of the Alps. I am not an expert on US geography, but there seem to be places with many people and much easier terrain to build rails on.