[reirob]

From all the cities that I used, Singapore was the one where I used most often taxis, because they were so cheap. It may have changed since 2004, but I think even for Singapore having electric cars, even for taxis might be better. What am I missing?

Other than this I agree that for cities public transportation, together with good infrastructure for bicycles is very important, because in most cities driving your car yourself is so bad: it is slow, demands a lot of attention, getting a parking place is often very difficult.