Tens of millions of American cross over bridges every day without giving it much thought, unless they hit a pothole. But the infrastructure problem goes much deeper than pavement. It goes to crumbling concrete and corroded steel and the fact that nearly 70,000 bridges in America -- one out of every nine -- is now considered to be structurally deficient.
The majority of bridges were built over 50 years ago when cars and trucks were much lighter. Also they were only designed to last 50 years. Every day millions of people travel across bridges that either need to be replaced or undergo major repairs.
The problem lies with funding. Public spending on infrastructure has fallen to its lowest level since 1947. And the U.S. which used to have the finest infrastructure in the world, is now ranked 16th according to the World Economic Forum, behind Iceland, Spain, Portugal and the United Arab Emirates.
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Mississippi River Bridge Failure 2007, USA Infrastructure Crises