Table 1-24: Condition of U.S. Highway Bridges
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 |
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 |
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 |
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.
SOURCE: U.S. Department of Transportation, Federal Highway Administration, Office of Bridge Technology, National Bridge Inventory Database, personal communication, Aug. 14, 2001.