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Mackinac Bridge

Mackinac Bridge
Bridge information
Other namesMighty Mac or Big Mac
Carries4 lanes of  
CrossesStraits of Mackinac
LocaleMackinaw City and St. Ignace, Michigan
Maintained byMackinac Bridge Authority
DesignSuspension bridge
Total length26372 ft (8038.2 m)
Width68.6 ft (20.9 m) (total width)
54 ft (16.5 m) (road width)
38.1 ft (11.6 m) (depth)
Height552 ft (168.2 m)
Longest span3800 ft (1158.2 m)
Vertical clearance200 ft (61 m)
Clearance below155 ft (47.2 m)
OpenedNovember 1, 1957
Toll$1.75 per axle for passenger vehicles ($3.50 per car). $3.50 per axle for motor homes. $4.50 per axle for commercial vehicles.
Daily traffic11600

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The Mackinac Bridge ( , ), is a suspension bridge spanning the Straits of Mackinac to connect the non-contiguous Upper and Lower peninsulas of the U.S. state of Michigan. Envisioned since the 1880s, the bridge was completed in 1957 only after many decades of struggles to begin construction. Designed by engineer David B. Steinman, the bridge (familiarly known as "Big Mac" and "Mighty Mac") connects the city of St. Ignace on the north end with the village of Mackinaw City on the south. It is the third longest in total suspension in the world and the longest suspension bridge between anchorages in the Western hemisphere. The Mackinac Bridge carries Interstate 75 across the straits.

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