Also the road infrastructure will continue to exist even if it's just for heavy transport (which is much worse on roads anyway).
If you're not aware of how much it costs to maintain roads, that's because it's largely subsidized FOR trucking, and incompletely at that.
Witness the state of roads and especially bridges, and explain how they should be maintained considering who's on them. Now remove trucking because we got smart and used rail for inter-city. You're either going to be using a ez-pass a lot more or the roads will be straight outta Mad Max.
And finally, it's a 6 hour flight or a 4-day driving trip. One's shorter and far safer, and the other one destroys friendships because Dave will not stop snoring and I swear I'm going to stop this car right now.