Mackinac Bridge Authority

Spanning the Straits of Mackinac since 1957

What is the width of the roadway?

Posted on October 14th, 2016

The width of the roadway is 54 feet. The outside lanes are 12 feet wide (2), the inside lanes are 11 feet wide (2), the center mall is 2 feet wide, and the catwalk, curb and rail width is 3 feet on each side – totaling 54 feet. The stiffening truss width in the suspended span is 68 feet wide making it wider than the roadway it supports.

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