Commuting in the United States: 2009 Source: Commuting in the United States: 2009 (PDF) Related Posts:How big data tells us when the "United States" literally…Apple, America and a Squeezed Middle Class - The New York…Why So Many Top Hackers Hail from Russia — Krebs on SecurityThe Importance of India, by Alex KolchinskiWhy Canada Is Able to Do Things Better - The Atlantic