If you are planning on heading South for the Winter, note that I75 Southbound is still closed once you cross the Ambassador Bridge in Detroit. You will have to follow the detour West and then South again to pick up I75.
Last March while returning from Florida with my family we noticed that the I75 Southbound was all torn up. There is a detour as seen on the map. I looked into it and found that it will be closed until late 2018. We did not know about it and thought I’d share this just in case you or anyone you know will be traveling soon.
See the details here.