Detroit - Windsor Tunnel

The Detroit - Windsor Tunnel is the only vehicular international sub aqueous border crossing in the world. It has been recognized as one of the great engineering wonders of the world and is the second busiest crossing between the United States and Canada. Located between Detroit, Michigan and Windsor, Ontario, connecting the US Interstates to Ontario’s Highway 401, it is one of the fastest links between Ontario and United States.

For more information, visit the Detroit - Windsor Tunnel website.

For more on the economic importance, security, strategies, infrastructure, and visions for the future of Michigan's border crossings, see this June 2004 presentation.

**The Detroit - Windsor Tunnel is privately owned and operated and is not under the jurisdiction of the Michigan Department of Transportation. The Detroit - Windsor Tunnel has sole responsibility for the contents of its website.

Effective June 1, 2009, U.S. citizens returning to the United States from Canada, Mexico, the Caribbean or Bermuda, by land or sea, will be required to present an approved travel document to be admitted to the United States.

A complete list of Western Hemisphere Travel Initiative compliant documents appears on the Department of Homeland Security website.