> What doesn't work is taking an existing car-centric city and making it more annoying for cars. It may not work alone, but it's an important part of the proce

> What doesn't work is taking an existing car-centric city and making it more annoying for cars. It may not work alone, but it's an important part of the process. Both the Netherlands and more recently Paris have found that carrot-only approaches don't work, you have to be prepared to make private car use worse, because otherwise most of the time a private car wins for the individual even as it causes a tragedy of the commons in terms of congestion.