“Structurally deficient” bridges used daily by thousands of drivers south of Boston

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An average of about 800,000 vehicles per day travel over several bridges south of Boston that are federally classified as “structurally deficient,” or in need of significant repairs, maintenance or replacement, according to a report released this month.

The report found that Massachusetts ranks 28th nationwide for most structurally deficient bridges, with under 10 percent of its 5,132 bridges under that ranking. Of the state’s structurally deficient bridges about 30 are located in communities south of Boston, according to the report and state transportation data.

Massachusetts is still doing better than many other states in its efforts to reduce the number of structurally deficient bridges. Since 2008, the state has reduced the number of structurally deficient bridges to 466 from 543.

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