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Bridges and crossings

A freighter in fog going under the Mackinac Bridge.
Department of Transportation

Bridges and crossings

In Michigan, there are three publicly-owned and operated bridges: Mackinac Bridge, Blue Water Bridge, and International Bridge.

There are also two privately-owned and operated border crossings: Ambassador Bridge and Detroit-Windsor Tunnel.

For more information on travel and crossing information, such as tolls, travel documentation, and traffic conditions, visit the individual bridge or border crossing website. 

Privately-owned crossings

Ambassador Bridge

Detroit-Windsor Tunnel

Publicly-owned bridges

Mackinac Bridge during the summer.

Mackinac Bridge

The Mackinac Bridge measures five miles long and is the longest suspension bridge in the western hemisphere. Located on I-75 in northern Michigan, it connects the lower peninsula in Mackinaw City with the upper peninsula in St. Ignace.

The International Bridge in red, white, and blue lights at night.

International Bridge

The Sault Ste. Marie International Bridge is the only vehicular crossing between Ontario and Michigan within a 300-mile distance. Located at the northern terminus of I-75, it connects Sault Ste. Marie, Michigan, with Sault Ste. Marie, Ontario.

An an ore boat passing underneath the Blue Water Bridge.

Blue Water Bridge

The Blue Water Bridges are a major international crossings over the St. Clair River at the southern end of Lake Huron. The bridges are located between Port Huron, Michigan, and Point Edward, Ontario.