Some cities are planning to tear down aging highways and replace them with parks. This strategy represents a continuing shift in the way public places are designed, particularly when it comes to park space and transportation. The idea is really to make cities more livable. On a similar note, we recently did a story on best cities for the outdoors which you can read here: http://www.forbes.com/home/2008/05/12/outdoors-health-cities-forbeslife-cx_rr_0512realestate.html