Table 1-3 - Highway Bridge Conditions: 1990 and 1997

Table 1-3 - Highway Bridge Conditions: 1990 and 1997

Functional category 1990 1997
Percentage structurally deficient Percentage functionally obsolete Percentage in good condition Total bridges Percentage structurally deficient Percentage functionally obsolete Percentage in good condition Total bridges
RURAL                
Principal arterials-- Interstates 5.2 20.9 73.9 29,076 4.5 12.2 83.3 28,073
Principal arterials-- Other 8.4 14.9 76.7 32,169 7.0 10.7 82.3 34,813
Minor arterials 14.1 14.5 71.3 40,927 10.4 11.8 77.9 38,401
Major collectors 19.5 13.3 67.2 103,979 13.4 10.4 76.2 95,751
Minor collectors 23.2 16.0 60.8 48,797 17.0 10.9 72.1 47,390
Local roads 38.1 15.2 46.7 208,487 26.1 11.3 62.6 210,678
Total rural 26.1 15.1 58.8 463,435 18.4 11.1 70.5 455,106
URBAN                
Principal arterials-- Interstates 9.9 30.2 60.0 24,435 7.4 19.4 73.2 27,142
Principal arterials-- other freeways/expressways 9.2 32.0 58.8 11,890 7.0 20.1 72.9 15,170
Other principal arterials 15.9 27.0 57.1 21,403 11.9 21.7 66.4 23,297
Major arterials 17.4 29.0 53.7 18,580 13.4 25.3 61.3 23,300
Collectors 20.2 29.0 50.8 11,876 15.2 23.4 61.4 14,939
Local roads 21.0 21.7 57.3 20,586 15.1 17.6 67.3 24,780
Total urban 15.5 27.8 56.7 108,770 11.6 21.0 67.3 127,628
URBAN AND RURAL 24.1 17.5 58.4 572,205 16.9 13.3 69.8 582,734

SOURCE: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory Database, 1998.