In fairness, private transit (e.g. cars) is also extremely inefficient, with gas taxes only paying for roughly half of the cost of roads, signage, lighting, mai

In fairness, private transit (e.g. cars) is also extremely inefficient, with gas taxes only paying for roughly half of the cost of roads, signage, lighting, maintenance &c. And then there's the cost in land value of parking lots, the cost to society of car accidents (until very recently, more people died due to car accidents than to guns), the emotional cost of being stuck in a little vehicle for hours upon hours a week. I do wish that public transit were nicer & cleaner. Something like PRT sounds just about perfect.