in 1999 and 2000 to be mileage based instead of being sequential. Related routes There are three auxiliary Interstate Highways related to I-75 in Georgia and a fourth that was proposed. I-175 was a proposed spur from Albany northeast to Cordele. The road was built, but not as a freeway; it is SR 300, the Florida–Georgia Parkway. I-475 is a western bypass of Macon, shortening the trip for through I-75 traffic. I-575 is a spur from near Marietta north to Canton and Nelson, and I-675 is a cutoff from I-75 south of Atlanta north to I-285 (Atlanta's perimeter)—east of I-75. Additionally, there are three business routes of I-75 in the state. The first I-75 Business Loop (I-75 BL) runs through central Valdosta mostly concurrent with US 221. The second I-75 BL runs through downtown Tifton mostly concurrent with US 41, and a third one that runs through Cordele. There was a former I-75 BL in Adel–Sparks. See also References External links I-75 at the Interstate Guide Georgia 75 Transportation in Lowndes County, Georgia Transportation in Cook County, Georgia Transportation in Tift County, Georgia Transportation in Turner County, Georgia Transportation in Crisp County, Georgia Transportation in Dooly County, Georgia Transportation in Houston County, Georgia Transportation in Peach County, Georgia Transportation in Crawford County, Georgia Transportation in Bibb County, Georgia Transportation in Macon, Georgia Transportation in Monroe County, Georgia Transportation in Lamar County, Georgia Transportation in Butts County, Georgia Transportation in Spalding County, Georgia Transportation in Henry County, Georgia Transportation in Clayton County, Georgia Transportation in Fulton County, Georgia Roads in Atlanta Transportation in Cobb County, Georgia Transportation in Cherokee County, Georgia Transportation in Bartow County, Georgia Transportation in Gordon County, Georgia Transportation in Whitfield County, Georgia Transportation in Catoosa County, Georgia