Graphic Version | Excel

NOTES: Excludes 39 bridges with no recorded age. Bridges with a Year Built or Year Reconstructed within the past 10 years will not be assigned a deficient status. Therefore, when referring to the deficiency being calculated not using the 10-year rule, the status will be calculated without taking into consideration the year built or the year reconstructed. U.S. totals include the 50 states, the District of Columbia, and Puerto Rico. 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. Functionally obsolete: does not meet current design standards (for criteria such as lane width), either because the volume of traffic carried by the bridge exceeds the level anticipated when the bridge was constructed and/or the relevant design standards have been revised. Structurally deficient: characterized by deteriorated conditions of significant bridge elements and potentially reduced load-carrying capacity. A "structurally deficient" designation does not imply that a bridge is unsafe, but such bridges typically require significant maintenance and repair to remain in service, and would eventually require major rehabilitation or replacement to address the underlying deficiency.

SOURCE: U.S. Department of Transportation, Federal Highway Administration, National Bridge Inventory. Available at https://www.fhwa.dot.gov/bridge/nbi.cfm as of November 2013.