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New technology for monitoring 150,000 aging US highway bridges

New technology for monitoring 150,000 aging US highway bridges, PHYS.org, July 31, 2012. On August 1, 2007, without warning, the roadway suddenly disappeared beneath drivers on Minneapolis’ I-35W Bridge. The collapse sent more than 100 cars into the Mississippi River, killing 13 and injuring 145. NC State engineering featured.