German drivers on the autobahn with no speed limits still drive about the same speed as US drivers on the interstate. Trains around the world regularly go much faster. That is before we get into how much safer trains are than even the best drivers (sorry humans, you all suck as drivers, it isn't "just the other guy"), or other environmental issues.

There is plenty of room for more rail in the US because I want to get "there" faster and planes are not faster for many trips.