The density is a function of our travel system. Putting dedicated passenger train routes into the US to connect the biggest cities would lead to the smaller cit

The density is a function of our travel system. Putting dedicated passenger train routes into the US to connect the biggest cities would lead to the smaller cities along the routes receiving increased immigration. Every city has a road through it to do the same thing. >In the USA, for passengers, it makes much more sense to fly than trains You don't live in the midwest I take it. It makes more sense to drive than to take a flight that passes you through one of the airline hubs for most every trip that is less than 400 miles.