This database provides information on the number of structurally deficient or obsolete bridges on public roads, including Interstate Highways, U.S. highways, State and county roads, andpublicly-accessible bridges on Federal lands. (NHS refers to bridges in the National Highway System.)  It contains a state-by-state summary of the number, location, and general condition of highway bridges.  See detailed background for more information. 

Categories include:

• Number of bridges
• Number of structurally deficient bridges
• Number of functionally obsolete bridges
• Number of deficiency (Total number of structurally deficient and functionally obsolete bridges)
• Total area (Total bridge area)
• Structurally deficient area (Structurally deficient weighted by deck area)
• Functionally obsolete area (Functionally obsolete weighted by deck area)
• Deficient area (Structurally plus functionally obsolete weighted by deck area).