AFAIK many car free cities depend also on bikes. What do you mean by taking away public transport? Because a car can be taken away, the access to roads can be t

AFAIK many car free cities depend also on bikes. What do you mean by taking away public transport? Because a car can be taken away, the access to roads can be taken away, there are traffic jams and in case of a city wide emergency - when everyone has a car, no one has.