The link posted in response to the original question is not a map of the Federal road that connected to the "horse path"( known after 1811 as the Federal Road) that entered Alabama. The road in question (that which entered Alabama) passed through Milledgeville, crossed the Flint River near present day Macon at the site of the Creek Agency run by Benjamin Hawkins, the initial Creek Factor who was appointed by George Washington, and continued westward to the Chattahoochee River crossing south of present day Columbus. On the Alabama side, the road passed near the site of Ft. Mitchell.
The map linked in your response may very well be known as the Federal road but it is not the "horsepath through the Creek nation" used by famous travellers like James Bartram, the Marquis de Lafayette, and Lt. Edmund Gaines who, after arresting Aaron Burr at Wakefield in Washington County, Mississippi Territory (now Alabama), returned Burr via the horsepath to Washington to face charges of treason. (Note: Despite my statement, it is unknown to me whether Gaines accompanied Burr all the way to the District of Columbia)
The Federal road in south Alabama played a role during the American War Between the States when it served as a corridor for raiding Federals under Lucas, Chrylser, and Steele as they pillaged and plundered their way north from the battles at Spanish Fort and Blakeley in the direction of Montgomery.
The Federal road detailed in your link is the connector from Cumberland road/Natchez Trace intersection to Savannah, Georgia.