I-75 is the only Interstate to traverse the full length of the state from north to south. ĭue to recent lane widening in southern Georgia completed in 2011, the only four-lane section of I-75 in Georgia is bypassed by six-lane I-475 along this route there are at least six lanes from the Alligator Alley portion of I-75 in Naples, Florida, to an portion of I-75 in Ooltewah (with the exception of a four-lane overpass on I-475 over a railroad track in Macon). The 190-mile-long (310 km) section of I-75 from the northern I-475 intersection to the US 11/ US 64 intersection in Ooltewah, Tennessee, is one of the longest continuous multi-state six-lane freeways in the US (some segments along this corridor have as many as 16 lanes). I-75 then traverses the hilly North Georgia terrain as it travels toward Chattanooga, Tennessee. North of Marietta, the final major junction in the Atlanta metropolitan area is the I-575 spur.
This section of I-75 just north of I-285 has 15 through lanes, making it the widest roadway anywhere in the Interstate Highway System. After the two Interstates split, I-75 heads in a general northwest direction while I-85 heads northeast, crossing outside the I-285 Perimeter and heading toward the major suburban city of Marietta. I-75 then runs concurrently with I-85 due north over the Downtown Connector through the central business district of Atlanta. It crosses inside the Perimeter and heads north several miles toward the Atlanta city center. The first metropolitan freeway met is I-675, then followed by the Atlanta "Perimeter" bypass, I-285. The freeway reaches no major junctions again until in the Atlanta metropolitan area. I-75 cosigned with I-85 in Downtown AtlantaĪfter Macon, I-75 passes the small town of Forsyth. Established in 1926, the Interstate's direct predecessor in Georgia is US 41, a national highway that has been largely supplanted in favor of the federally-funded freeway built under the Interstate Highway System-though limited-access elements of the Interstate existed as early as 1951. What would become the general routing of I-75 in Georgia was initially used by the western routing of the Dixie Highway beginning in 1916. The segment from SR 49 in Byron to I-16 in Macon is part of the Fall Line Freeway and may be incorporated into the eastern extension of I-14, which is currently entirely within Central Texas and is proposed to be extended to Augusta. In Downtown Atlanta, I-75 joins with I-85 as the Downtown Connector.
It is also designated-but not signed-as State Route 401 ( SR 401). Route 41 (US 41) corridor in the central part of the state, traveling through the cities of Valdosta, Macon, and Atlanta. Interstate 75 ( I-75) in the US state of Georgia travels north–south along the U.S. Lowndes, Cook, Tift, Turner, Crisp, Dooly, Houston, Peach, Crawford, Bibb, Monroe, Lamar, Butts, Spalding, Henry, Clayton, Fulton, Cobb, Cherokee, Bartow, Gordon, Whitfield, Catoosa
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