The Better Roads Bridge Inventory is an exclusive, award-winning annual survey that has been conducted since 1979. Bridge engineers from every state and Washington, D.C., are set a survey with both qualitative and quantitative questions. The Federal Highway Administration, in consultation with the states, has assigned a sufficiency rating, or SR, to each bridge (20 feet or more) that is inventoried. Formula SR rating factors are as outlined in the current Recording and Coding Guide for Structures Inventory and Appraisal SI&A of the Nation’s Bridges. The qualitative data is gathered through a questionnaire about major issues concerning bridge conditions and maintenance.
Shockingly high number of bridges remain sub-standard.
There are 597,787 bridges in America, 288,920 interstate and state bridges and 308,867 city/county/township bridges.
But 21.6 percent – or 62,504 – of the interstate and state bridges are structurally deficient (SD) or functionally obsolete (FO). And 25.7 percent of the city/county/township bridges – or 79,394 – are SD/FO.
Maintenance, personnel, training, age, environmental restrictions, a need to minimize traffic disruption, capacity and corrosion issues remain major barriers to lowering the rate of bridges becoming deficient, despite some respite coming from stimulus fund money.
Texas leads the nation with the most combined structurally deficient and functionally obsolete bridges. The state has 9,564 — 19 percent — of its total 50,316 bridges as SD/FO. Of the total 32,862 interstate and state bridges, 4,182, or 31 percent, are SD/FO. Of the 17,454 total city/county/township bridges, 5,383 or 13 percent are SD/FO.
