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Bridges & Crossings

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

Bridges & 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

Mackinac Bridge during the summer.

Mackinac Bridge

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

Mackinac Bridge
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. The International Bridge is located at the northern terminus of I-75 and connects Sault Ste. Marie, Michigan, with Sault Ste. Marie, Ontario.

Sault Ste. Marie International Bridge
An an ore boat passing underneath the Blue Water Bridge.

Blue Water Bridge

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

Blue Water Bridge