Walk, Don't Walk
The pedestrian mall as a concept proved problematic for many towns and cities in the 1970s and 80s. Instead of providing a vibrant space in which people could stroll comfortably, knowing there would be no traffic, they often turned into wastelands of closed stores, with only buses rolling through. New York City, though, has had success with "bus traffic only" pedestrian malls around Times Square and Herald Square. They've recently announced a third one, to alleviate cross-town traffic in the shopping area on 34th Street. Reactions have been mixed, at best. Read about it at http://www.nytimes.com/2010/04/23/nyregion/23street.html?scp=2&sq=34th%20pedestrian%20mall&st=cse, http://roomfordebate.blogs.nytimes.com/2010/04/26/confronting-the-mire-on-34th-street/?scp=1&sq=34th%20pedestrian%20mall&st=cse, and http://cityroom.blogs.nytimes.com/2010/04/28/everything-the-traffic-will-allow/?ref=nyregion.
For background and discussion on the pedestrian mall concept, search the keywords " "'pedestrian trafficways' and mall?" in TRANweb amd NUcat.