http://blogs.thecarconnection.com/marty-blog/1038131_shockingly-high-number-of-u-s-bridges-substandard-still

...A "shockingly high number"--25.7 percent--of America's 598,000 bridges are  either structurally deficient or functionally obsolete. The highest percentage in the nation (55 percent) belongs to the District of Columbia, followed by Rhode Island (53 percent), Pennsylvania (39 percent), Hawaii (38 percent), and New York (37 percent).