Where is the Dixie Highway?

A road sign along M-125 (S. Dixie Hwy.) in Michigan.

I've been searching for roads named Dixie Highway on map web sites. Tonight I took a virtual trip from North to South down the Dixie Highway. I think that all that remains of the Dixie Highway is on local road signs. There were so many roads called Dixie Highway at one time or another that it can get confusing. Some of them run parallel. Maybe one road is older than the other and the new road is adopted as the latest Dixie Highway. There are also roads called "Old Dixie Highway." Most of them run nearly parallel to Interstate 75.