Over the last year, the NTSB identified 68 bridges built before 1991 that don't have a "current vulnerability assessment" and need to be evaluated.
Among them are major New York City bridges including the Verrazano, Brooklyn, George Washington, Manhattan and Williamsburg. Also on the list are the Chicago Skyway, Mackinac Bridge in Michigan ...
A full list can be found in Appendix B of the NTSB report. The bureau noted that the findings does not suggest that the 68 bridges are certain to collapse, only in need of assessment under AASHTO ...