People are happier in a walkable neighborhood: the US community that banned cars
> car-free neighborhood built from scratchI am not sure the "building from scratch" approach can really move the needle in terms of livable and sustainable urban environments. Like, how many centuries before natural replacement rates would achieve a transition?The key challenge much of the world is facing (certainly the most polluting part of the world) is to rehabilitate the vast numbers of existing housing stock, and reinvent better uses of the existing urban layouts as people are stuck with them.An exception where such green-field ideas could have impact would be in the context of developing world urbanization (i.e., how not to do the same mistakes others did) but there other considerations (cost) enter the discussion.