"structurally deficient or functionally obsolete".

Here's some bad news for all of us: Over 150,000 bridges in the U.S. have been judged to be "structurally deficient or functionally obsolete." And get this, there are less than 598,000 bridges in America. That means 25.7% aren't in very good shape. It turns out that the state with the most structurally deficient or functionally obsolete (SD/FO) bridges is Texas, with 9,564 such bridges. However, Texas is ginormous – almost half the size of Alaska – and therefore has a lot of bridges, but the percentage of Texan SD/FO bridges is 19%. And that's significantly lower than the national average...Link