Michigan’s Mackinac Bridge among 68 in US that NTSB recommends be evaluated for risk of collapse
Read full article: Michigan’s Mackinac Bridge among 68 in US that NTSB recommends be evaluated for risk of collapseMichigan’s Mackinac Bridge is among the 68 bridges across 19 states that the National Transportation Safety Board recommended be assessed to determine “the risk of collapse from a vessel collision.”