Figure 6: Percentages of Highway Bridges with Deficiencies by Highway Type in 2006,,
,Percent Structurally Deficient,Functionally Obsolete
Rural,,
Interstate,4.3%,11.1%
Other Arterial,6.6%,9.5%
Collector,11.5%,10.3%
Local,18.7%,11.3%
Total Rural,13.6%,10.6%
Urban,,
Interstate,5.9%,20.9%
Other Arterial,8.2%,23.0%
Collector,10.9%,25.3%
Local,10.9%,19.4%
Total Urban,8.6%,22.1%
"NOTE: Bridges that are both structurally deficient and functionally obsolete are classified as structurally deficient.  Numbers include the 50 U.S. states, the District of Columbia, and Puerto Rico.",,
"SOURCES: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory, Deficient Bridges by State and Highway System, various years, available at http://www.fhwa.dot.gov/bridge/britab.htm as of Aug. 14, 2007.",,