I want to travel to Windsor using the Windsor/Detroit tunnel bus. I am a non-US-citizen from Pakistan. I read that I am 'required' to get back on the tunnel bus after customs but what if my customs clearance takes too long? I am fine with being left behind since I can ask a friend to pick me up on the Windsor side, but would I be in trouble legally if I am unable to make it back on the bus? I anticipate my customs to take long since I am performing my first landing as a new permanent resident to Canada.
The tunnel bus between Windsor and Detroit runs frequently. If your clearance takes too long the bus will leave without you and you will take the next tunnel bus. You will be shown where to wait in this case.
I've once departed a Greyhound bus exactly on the boundary crossing into New York state from Ontario, and took a taxi from the border to my destination.