Mackinac Bridge Authority

Spanning the Straits of Mackinac since 1957

What is the width of the roadway?

Posted on October 14th, 2016

Answer:
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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