[bananalychee]

I don't think that autonomous buses would be as cost-effective as private vehicles, since you'd want someone to be on board for security on a shared vehicle even if they're not in the driver's seat. Labor is the most expensive component of public transit operating costs, at least in my area. That said, in low-density areas it's not uncommon to see just one or two people on a big bus that comes once every 40 minutes in the middle of a weekday, and I'm sure running autonomous taxis instead would provide better service at a lower cost, given the same subsidies.