1-2,,,,
Condition of U.S. Highway Bridges: 1990–2007,,,,
Mode,1990,2000,2006,2007
Total all bridges,"572,205","589,674","597,340","599,893"
Urban,"108,770","133,384","146,041","151,102"
Rural,"463,435","456,290","451,299","448,791"
"Structurally deficient bridges, total","137,865","86,692","73,784","72,264"
Urban,"16,847",U,"12,585","12,882"
Rural,"121,018",U,"61,199","59,382"
"Functionally obsolete bridges, total","100,355","81,510","80,317","81,257"
Urban,"30,266","29,398","32,292","33,096"
Rural,"70,089","52,112","48,025","48,161"
Key: U = unavailable.,,,,
"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; the following is a link to Chapter 3 of the report: http://www.fhwa.dot.gov/policy/2006cpr/pdfs/chap3.pdf.",,,,
"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 August of that year.,,,,
"Source: 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 2007.",,,,