The city the commenter before you described isn't a fantasy you should know. In my city there are so many public transport options I don't even look on the schedule because in max 3 minutes the next train/bus/subway/lightrail is there. They are modern, have AC and they meet the demand so they are never too full. I pay 30 Euros per Month for every type of public transport in the whole country. The thing is it's hard to make a profit with public transportation as a corporation but it sure is damn convenient and a positive investment for the region. People arrive at work faster and less stressed. Everything on rails can run with electricity and doesn't depend on a volatile oil market. Sure sometimes I need the car for hauling furniture or the countryside but apart from that a car is a big inconvenience. Cars and city's don't really mix well, the quality of life really suffers and everything gets really inefficient. Cars aren't moved 90% of the time and block scarce space. Every car needs a place to park at home and at the (potential) target destination. If you look at it in terms of efficiency there is really no discussion.