Source: http://www.americainfra.com
Related posts:
New York Underground Networking
Interactive: Cumulative emissions of G20 & non-G20 countries: 1751-2006
How Wealthy Countries TAX Their Citizens [Infogaphic]
Number of flood events by continent and decade since 1950
Evolution of The American University
The Most Dangerous Jobs in America
Interactive earthquake primer
Professional Athlete Paydays - Compared to Your Job
70 Year History of Supercomputers [Infographic]
Social media: The new news source [Infographic]