The Detroit Windsor Tunnel is nearly 100 years old and was the first and only underwater tunnel for vehicles connecting two countries. But, there is much more to that tunnel than what people see when driving through it.

The Detroit-Windsor Tunnel will remain open amid the Detroit Grand Prix, but passes will be required to access the tunnel.

The Detroit Windsor Tunnel will be closed for several hours on Sunday for an annual emergency response exercise.

Traffic is still not moving on the international Ambassador Bridge, officials say, amid efforts by Canadian law enforcement to remove protesters who have blocked travel in the area for days.