I wandered into this video about what I think is an amazing achievement; Ciclovia in Bogota, Colombia. Every sunday from 7am to 2pm they close 70 miles/112 Km of roads to cars and open them up to people. People, it's amazing what it does for a city when people get out of their cars, and out of their homes and hit the streets. This needs to happen everywhere ASAP. A film about 9 minutes long, but a worthwhile topic. "here": http://www.streetfilms.org/archives/ciclovia/