Figure 1-2 Condition of U.S. Highway Bridges: 2005–2011
SOURCE: U.S. Department of Transportation, Federal Highway Administration, Office of Bridge Technology, National Bridge Inventory (NBI), Count of Bridges by Highway System, available at http://www.fhwa.dot.gov/bridge/britab.htm as of January 2013 as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-28, available at http://www.bts.gov/publications/national_transportation_statistics/ as of January 2013.