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Were U.S. interstates really designed as runways?

Were U.S. interstates really designed as runways?

There's an urban legend that U.S. interstates were really designed as emergency runways. Find out if there's any truth to the legend at HowStuffWorks.


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Sources

  • Blockley, David. "Bridges" Oxford University Press. 2010.
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  • Merchant, Brian. "Living Bridges in India Have Grown for 500 Years." TreeHugger.com. Sept. 28, 2010. (May 17, 2011)http://www.treehugger.com/files/2010/09/living-bridges-india-grown-500-years-pics.php
  • "Rivers." Human Planet Explorer. 2011 (May 17, 2011)http://www.bbc.co.uk/nature/humanplanetexplorer/environments/rivers
  • Wilford, John Noble. "How the Inca Leapt Canyons." New York Times. May 8, 2007. (May 17, 2011)http://www.nytimes.com/2007/05/08/science/08bridg.html