Depends on the cost. If cost were not a concern, everyone would take a private cab. And if 1 occupant per 2-ton-vehicle becomes the norm, dense cities will imp

Depends on the cost. If cost were not a concern, everyone would take a private cab. And if 1 occupant per 2-ton-vehicle becomes the norm, dense cities will implement congestion pricing or surtaxes to force multiple occupancy or public transport usage - if 1 million driverless taxis try to deliver people into the square mile of the City of London, everyone will have a bad time. (Ditto for Manhattan, SF, downtown Boston, Hong Kong Midtown etc.)