Another reality impacting transportation is the ability to have satisfying travel experiences without even leaving home, like, LSD, man. LOL. Seriously though, the reasons for travel may be lessening as many experiences and goods can be delivered (yes, vehicularly - although micro maglev infrastructure could impact that, too).
Subsurface micro-maglev delivery systems would be interesting.
—”Subsurface micro-maglev delivery systems would be interesting.”
Have you been hanging around with Mr Musk, did he share his stash with you?
By some coincidence, yesterday this video popped up in my YouTube feed...
Forgotten Tunnels Under Chicago - EXPLORING The History of Chicago Tunnels
This was a turn-of-the-20th century effort to put delivery systems into more than 60 miles of tunnels beneath Chicago. It was in use for about 60 years and was eventually abandoned and more or less forgotten. Inevitably, something went wrong.
I wonder what would have happened if this had happened 30 years later, given the incompetence of the current city government.