Almost 2/3 of Americans live in states with population density comparable to Europe. The real issue is that the density is too uniform to make rail a viable for

Almost 2/3 of Americans live in states with population density comparable to Europe. The real issue is that the density is too uniform to make rail a viable form of transportation. If you take a major American city and the surrounding suburbs and drop it in Europe, it will likely cover several cities, their suburbs, and rural land between the cities.