States seek alternatives for highway, bridge funding

Touted as one of the first interstate highways, a 200-mile span of Interstate 70 between suburban St. Louis and Kansas City stands as a prime example of the challenges facing the nation's roads. Built in the 1950s and '60s with a 20-year-life expectancy, the four-lane highway is crumbling beneath its surface and clogged with traffic as it carries more than 30,000 vehicles a day on many of its rural stretches, requiring more frequent repaving.

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