The bridge to Canada in Detroit has been closed, according to the Michigan Department of Transportation, and motorists should use the tunnel rather than the bridge, or head to the Blue Water Bridge that goes from Port Huron to Sarnia, Ontario.

February 8, 2022

https://www.yahoo.com/now/protesters-canada-block-ambassador-bridge-011620223.html

Sounds like truckers are opening a lane:

Ambassador bridge closed in both directions!

https://www.youtube.com/watch?v=Pcs7_BugQAc