> We should build a "car-free" city just to see how well it will go. Fairly sure we were doing exactly that for most of the last 9000 years or so. Anyway, it'

> We should build a "car-free" city just to see how well it will go. Fairly sure we were doing exactly that for most of the last 9000 years or so. Anyway, it's hard to see how it will solve or prove anything - the vast majority of us aren't going to move to greenfield cities. We already have plenty of towns and cities around the world (not many in the US, granted) that have managed to strike a reasonable balance between car-usage and other forms of getting around, at a "human" scale. The primary challenge is ensuring future urban development follows that path rather than continuing the same trends of excessive devotion to cars-above-all that we've witnessed in many cities over the last 70 or 80 years.