By Jason Lange
(Reuters) - Long famous for its top-notch highways and passion for cars, the United States is letting bridges rust as traffic chokes overburdened roads, threatening a pillar of its economic strength.
A prime example of this neglect is the Brent Spence Bridge over the Ohio River. It worked well when it opened in 1963. Now it handles twice the traffic it was designed to support. Gridlock often stretches for a mile beneath a thick haze of smog.