A policy of no cars for anyone living in a city, with appropriate exceptions (eg people with mobility problems) would make sense. Sensible city dwellers have abandoned using cars already.

Decent public transport everywhere would make it possible to cut down car use. Living in a smallish town I never dream of going by car if there's an adequate alternative. I do about 2,000 miles driving in a year. I'd sooner do a crossword or read or look at the scenery than concentrate on not getting killed.