When it begins to fall apart more dramatically, then public outcry will cause it to be built or abandoned. Perhaps some public transport inspector will cite it as unsafe for usage and a year or two on non usage will cause some interest in such a huge capital cost item — but not until that sort of shake up will you see such a large bridge replaced in the Obama Economic Stagnation.
Some code in the first auto reply is wrecking havoc on type font throughout the rest of the thread on many threads today.