Really, though, infrastructure stuff is neat, and we probably should start fixing it up. The main problem is the size of the US infrastructure is outstandingly staggering. There's an article [0] that's an argument for pouring money back into the highway funds (and the like), and the cash involved is worse than astronomical. At the very least, I didn't know there were over 600000 bridges in the US... I honestly don't know where we put them all. (Are overpasses included?)
[0] http://www.budget.senate.gov/democratic/public/index.cfm/rep... I don't go to senate.gov much, so I'm guessing this is pretty partisan, but there's a crapton of followup links that are at least interesting.