Isn't the USA mainly "car country" anyway? How much of a long distance rail network is there, and how regular are services? I'm not sure if an extensive rail network would be economically viable anymore, e.g. from coast to coast?
I would venture to say The Dwight D Eisenhower National System of Interstate and Defense Highways is King here in the States. Indeed "car country". Developing a high speed rail system in the States is a highly debated topic.