How to design a city?

Auroville anyone ?
Its spaced out, but car free afterall

edited: Yes, this is on Earth. Pondicherry to be precise (famous through Life of Pi)

I haven't come across this before, but on wikipedia it is described as a utopian project that will eventually have 50,000 residents (currently under 2,000). There seem to be a lot of factors in it that immediately disqualify it as a comparator, I would think?

http://en.wikipedia.org/wiki/auroville