Source : http://blogs.trb.com
Related posts:
High-Flier [Infographic]
Number of pirate attacks in 2005-2009
Holidays by the numbers
A Look at Work Hours & Vacation Time Around the World
Aftermath of the Chernobyl disaster [Infographic]
UK Burglary Statistics 2009-2011 [Infographic]
Global Medical Meetings [Infographic]
Historic and Notable Trees Around the World
Rise of the machines
Life Spans of the Animal Kingdom [Infographic]