ST. IGNACE, Mich. (Michigan News Source) – The Mackinac Bridge Authority announced that the Mackinac Bridge will be closed to all traffic for half-hour intervals on two nights this month so crews can complete electrical work.

The Mackinac Bridge Authority planned the closures for 2:30 to 3 a.m. on Nov. 29 and 30. Crews will work on replacing the bridge’s backup power system during both brief closures.

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Bridge officials chose those times and dates for the electrical work because that is the lowest traffic volume in the late fall.

In addition, the project will knock the Mackinac Bridge’s tolling system offline during those times.