There are plenty of locations in the US where fast intercity regional rail could easily be useful and work. Florida, Portland - Vancouver, Alabama/Georgia/Carol

There are plenty of locations in the US where fast intercity regional rail could easily be useful and work. Florida, Portland - Vancouver, Alabama/Georgia/Carolinas/Virginias, Midwest. Yeah, few people will take a cross-country train outside of for the novelty and the attraction itself (which are still not to be dismissed), but that doesn't mean there aren't plenty of <4-5h trips that can be made via train if there was good, reliable and fast service.