I hate to say it, but the car culture genie is out of the bottle and putting it back might be impossible. EVs and self-driving cars at least mitigate the environmental damage and inefficiency somewhat.

That said, a simultaneous push for PT (possibly even self-driving PT!) needs to happen. Compulsory auto ownership and its attendant costs represent a significant financial burden to the average person. Giving people options other than the car can open the door to walkable districts, at least, if not entire cities.