Freedom from cars, freedom from sprawl, freedom to walk your city! City planner Jeff Speck shares his "general theory of walkability" four planning principles to transform sprawling cities of sixlane highways and 600foot blocks into safe, walkable oases full of bike lanes and treelined streets.

TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design plus science, business, global issues, the arts and much more.
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