The Dixie Highway was a United States automobile highway, first planned in 1914 to connect the US Midwest with the Southern United States. It was part of the National Auto Trail system, and grew out of an earlier Miami to Montreal highway. The final result is better understood as a network of connected paved roads, rather than one single highway. It was constructed and expanded from 1915 to 1927.
The Eastern Route
The Eastern route connected Sault Ste. Marie, Michigan with Miami, Florida, running via Saginaw and Detroit in Michigan; Toledo, Bowling Green, Dayton, and Cincinnati in Ohio; Lexington in Kentucky; Knoxville and Chattanooga in Tennessee; Atlanta and Savannah in Georgia; and Jacksonville and West Palm Beach in Florida.
In Michigan's Upper Peninsula, the highway follows MI 129 from Sault Ste. Marie to Pickford and then west to follow a short portion of former U.S. Route 2, replaced by the Mackinaw Trail. It crossed the Straits of Mackinac and then used U.S. Route 23 and old U.S. Route 10 to Detroit. Currently it still exists in Michigan as the name of a secondary road from Saginaw southeast to the county line (as an alternate route to Flint), from southeast Flint to northwest Pontiac, and from Flat Rock southwest to Monroe ending at the state line. A short section of the Dixie Highway in northwest lower Michigan running north from Eastport in Antrim County to the village of Norwood in Charlevoix County is named Old Dixie Highway--U.S. Route 31 parallels this road to the east. In Ohio, it is old U.S. Route 25 to Cincinnati, current U.S. Route 25 and U.S. Route 25W to Knoxville, and U.S. Route 70 and U.S. Route 27 to Chattanooga. The eastern division took a more direct route than the western between Chattanooga and Atlanta, following U.S. Route 41 all the way, but it followed a more circuitous path south of Atlanta. Traffic left Atlanta to the east on U.S. Route 278, following U.S. Route 441, Georgia State Route 24, a short section of U.S. Route 301, and Georgia State Route 21 to Savannah. There, the route turned south along the coast via U.S. Route 17 to Jacksonville and U.S. Route 1 to Miami.
Source: Wikipedia

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