1-2 Condition of U.S. Highway Bridges: 1990-2007
1-2 Condition of U.S. Highway Bridges: 1990-2007
| Mode | 1990 | 2000 | 2006 | R2007 |
|---|---|---|---|---|
| Total all bridges | 572,205 | 589,674 | 597,340 | 599,766 |
| Urban | 108,770 | 133,384 | 146,041 | 151,171 |
| Rural | 463,435 | 456,290 | 451,299 | 448,595 |
| Structurally deficient bridges, total | 137,865 | 86,678 | 73,784 | 72,520 |
| Urban | 16,847 | 13,079 | 12,585 | 12,951 |
| Rural | 121,018 | 73,599 | 61,199 | 59,569 |
| Functionally obsolete bridges, total | 100,355 | 81,510 | 80,317 | 79,804 |
| Urban | 30,266 | 29,398 | 32,292 | 33,139 |
| Rural | 70,089 | 52,112 | 48,025 | 46,665 |
Key: R = revised.
Notes: Explanations for the terms Structurally Deficient and Functionally Obsolete can be found on pages 14 and 15 in Chapter 3 of the Federal Highway Administration, 2006 Conditions and Performance Report, available at http://www.fhwa.dot.gov/policy/2006cpr/pdfs/chap3.pdf as of November 2008.U.S. totals include the 50 states, the District of Columbia, and Puerto Rico. Data include: 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 are as of December of that year; data for 2000 are as of August of that year; data for 2006 are as of July of that year; data for 2007 are as of December of that year.
Sources: Federal Highway Administration, Office of Bridge Technology, National Bridge Inventory Database, Count of Bridges by Highway System, available at http://www.fhwa.dot.gov/bridge/britab.htm, as of March 2008 as reported in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, Table 1-27, available at http://www.bts.gov as of November 2008.