I have now read the article about a city without cars. I believe that what the article states is bound to happen. In every major city this is already being applied, people don't need a car or any other sort of personal transportation, they manage just fine by taking the bus or the subway. I assume people are doing this because it is a convinience. You don't have to park the car or fill it up with petrol. But this only applies to the bigger cities, say New York or Tokyo.

In some places in the world it is already inconvinient to own a car. If you look at London which is the most expensive place in the world to park a car for a month. To park a car in London you will have to pay around $1000 to park your car for one month.

I personally do not use personal transportation all that much, I live in a small town outside of Karlstad I've been traveling with public transportation all my life and I haven't really had any problems with it at all. The only thing that I can complain about is the time schedule of the busses. The only major change this bring to my life is that if forces me to plan my days and this is not a bad thing.
 
But I also feel that before you ban cars or anything even remotly close to that, you are better of trying to change the mindset of the citizens. You will never be able to change peoples minds if the people doesn't want to change their minds. So in conclusion, I think that the idea of having a city without cars is good and that it is bound to happend eventually, but I don't think that you can force people into using public transports.

Max Jacobs.