Tom Vanderbilt has curated the Nimble Cities project at Slate.
There are some good ideas (nothing I haven't seen before, unfortunately, though lots that has yet to be implemented). Clearly the voting was gamed by at least some of the participants. ("Humanity's Highway to a Sustainable Society Submitted by George Schrader"). I am pleased to see the Land Value Tax ("eliminate the property tax") getting some love (if not some gamesmanship), as well as ultra-narrow cars. Lots of attention for bicycles (3 of top 10), especially given their current mode share in US cities.
Reallocating roadspace (modally, directionally, by vehicle type, dynamically, etc.) needs far more attention than it gets.