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Pages 5-6

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From page 5...
... 5 chapter one IntroductIon A central challenge for an aging U.S. infrastructure is managing aging bridges safely and costeffectively.
From page 6...
... 6 survey A survey was distributed electronically to 62 transportation agencies, including state transportation agencies for all 50 states, Puerto Rico, and the District of Columbia as well as ten Canadian provinces and territories. Forty-five of the 50 state departments of transportation (DOTs)

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