Table 1-24:  Condition of U.S. Highway Bridges ,,,,,,,,,,,
,1990  ,1991  ,1992  ,1993  ,1994  ,1995  ,1996  ,1997  ,1998  ,1999  ,2000  
Urban bridges,"108,770","112,363","115,312","117,488","121,141","122,537","124,950","127,633","128,312","130,339","133,384"
Rural bridges,"463,435","461,673","456,885","456,228","455,319","458,598","456,913","455,118","454,664","455,203","456,290"
  Total,"572,205","574,036","572,197","573,716","576,460","581,135","581,863","582,751","582,976","585,542","589,674"
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Urban deficient bridges,,,,,,,,,,,
Structurally ,"16,847","17,032","16,323","15,932","15,692","15,205","15,094","14,846","14,073","12,967","12,695"
Functionally ,"30,266","30,842","26,243","26,511","27,024","27,487","28,087","26,865","27,588","29,065","29,398"
  Total,"47,113","47,874","42,566","42,443","42,716","42,692","43,181","41,711","41,661","42,032","42,093"
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Rural deficient bridges,,,,,,,,,,,
Structurally ,"121,018","117,502","102,375","96,048","91,991","89,112","86,424","83,629","78,999","75,183","70,881"
Functionally ,"70,089","66,751","54,150","53,489","52,808","53,463","53,121","50,545","51,912","52,835","52,112"
  Total,"191,107","184,253","156,525","149,537","144,799","142,575","139,545","134,174","130,911","128,018","122,993"
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All deficient bridges,,,,,,,,,,,
Structurally ,"137,865","134,534","118,698","111,980","107,683","104,317","101,518","98,475","93,072","88,150","83,576"
Functionally ,"100,355","97,593","80,393","80,000","79,832","80,950","81,208","77,410","79,500","81,900","81,510"
  Total,"238,220","232,127","199,091","191,980","187,515","185,267","182,726","175,885","172,572","170,050","165,086"
"NOTES:  Structurally deficient bridges are defined as those needing significant maintenance attention, rehabilitation, or replacement.",,,,,,,,,,,
"Functionally deficient bridges: those that do not have the lane widths, shoulder widths, or vertical clearances adequate to serve traffic demand; or the bridge may not be able to handle occasional roadway flooding. ",,,,,,,,,,,
"Table includes: rural–Interstate, principal arterial, minor arterial, major collector, minor collector and local roads; urban–Interstate, other freeways or expressways, other principal arterial, minor arterial, collector, and local roads. ",,,,,,,,,,,
"Data for 1990, 1992 and 1997-99 are as of December of those years; data for 1991, 1994-96 are as of June of those years; data for 1993 is as of September of that year; and data for 2000 is as of August of that year. ",,,,,,,,,,,
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"SOURCE:  U.S. Department of Transportation, Federal Highway Administration, Office of Bridge Technology, National Bridge Inventory Database, personal communication, Aug. 14, 2001. ",,,,,,,,,,,
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