Table 1 Listing of NHS deficient bridges from 2001–2009 (Status of the Nation’s Highways, Bridges, and Transit: Conditions and Performance 2010).
From: Synthesis of DOT Use of Beam End Protection for Extending the Life of Bridges
Analysis approach | Percentage of deficient bridges by year | ||||
|---|---|---|---|---|---|
2001 | 2003 | 2005 | 2007 | 2009 | |
Weighted by deck area | |||||
Structurally deficient (%) | 8.4 | 8.8 | 8.5 | 8.4 | 8.2 |
Functionally obsolete (%) | 22.0 | 20.9 | 21.3 | 21.3 | 21.0 |
Total deficient (%) | 30.4 | 29.7 | 29.8 | 29.7 | 29.2 |
Weighted by ave. daily traffic | |||||
Structurally deficient (%) | 7.2 | 7.1 | 6.6 | 6.5 | 6.2 |
Functionally obsolete (%) | 20.5 | 20.0 | 20.2 | 20.2 | 20.0 |
Total deficient (%) | 27.7 | 27.1 | 26.8 | 26.7 | 26.2 |
Weighted by bridge count | |||||
Structurally deficient (%) | 6.0 | 5.9 | 5.7 | 5.5 | 5.2 |
Functionally obsolete (%) | 17.4 | 17.0 | 16.9 | 16.7 | 16.6 |
Total deficient (%) | 23.3 | 22.9 | 22.6 | 22.2 | 21.9 |