An alternate, and more realistic version of the Green Leap Forward.
Two points: I fear the day that we won’t be allowed to drive, except in special circumstances (like amusement parks).
Point Two: I suspect that a lot of current auto traffic will move to the air, with the advent of Urban Air Mobility, particularly if the vehicles can be powered from the ground (e.g., Jeff Greason’s and Dan DeLong’s Electric Sky is working on such a concept). Airbus has an interesting concept of moving passengers via passenger modules that are moved from one vehicle type to another, like cargo containers, in which you’d share a pod with people from your door to an aircraft, to a long-range aircraft, to another aircraft, to the other door. That’s a lot more interesting and flexible concept than high-speed rail.