Mackinac Bridge Authority

Spanning the Straits of Mackinac since 1957

How did the Mackinac Bridge Authority determine what wind speeds resulted in advisories and closures?

Posted on February 14th, 2023

The current procedures were developed primarily through years of experience, learning what wind speeds cause issues for particular vehicles. We’ve learned lessons from previous incidents, improved the devices we use to measure the wind, the way we convey that information through message boards and the bridge radio station, and have continued to improve by sharing information through Twitter, texts, and webcams.

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