Shinkansen trains work in Japan because of a lot of different factors including population density in metropolitan areas and massive government subsidies. They are not always profitable.
Any attempt to build a shinkansen system in America will become an automatic target for the lawsuit industry. I don’t see it happening.
Yep. I wonder too how many proponents of true high speed rail are really aware of the infrastructure they require. It's not a matter of simply bringing in a Shinkansen, plopping it down on the existing track and expecting it will go 300 kmph.