Interstate 75 (I-75) in the US state of Georgia travels north–south along the U.S. Route 41 (US 41) corridor in the central part of the state, traveling through the cities of Valdosta, Macon, and Atlanta. It is also designated—but not signed—as State Route 401 (SR 401).
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. 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.
Route description
With a length of 355.1 miles (571.5 km), I-75 is the longest Interstate Highway in Georgia.[1] It enters the state near Valdosta, and it continues northward through the towns of Tifton and Cordele until it reaches the Macon area, where it intersects with I-16 eastbound toward Savannah. For northbound traffic, I-475 provides a relatively straight bypass west of that city and I-75's route.
I-75 cosigned with I-85 in Downtown Atlanta
After Macon, I-75 passes the small town of Forsyth. The freeway reaches no major junctions again until in the Atlanta metropolitan area. The first metropolitan freeway met is I-675, then followed by the Atlanta "Perimeter" bypass, I-285. It crosses inside the Perimeter and heads north several miles toward the Atlanta city center. I-75 then runs concurrently with I-85 due north over the Downtown Connector through the central business district of Atlanta. The two Interstates intersect I-20 in downtown. Several miles north of the I-20 interchange, 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. This section of I-75 just north of I-285 has 16 through lanes, making it the widest roadway anywhere in the Interstate Highway System.[4] North of Marietta, the final major junction in the Atlanta metropolitan area is the I-575 spur. I-75 then traverses the hilly North Georgia terrain as it travels toward Chattanooga, Tennessee.
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).[citation needed]
Due to recent lane widening in southern Georgia completed in 2011,[5] 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 a portion of I-75 in Ooltewah (except a four-lane overpass on I-475 over a railroad track in Macon).
I-75 is the only Interstate to traverse the full length of the state from north to south. The entire length of I-75 in Georgia is part of the National Highway System, a system of routes determined to be the most important for the nation's economy, mobility, and defense.[6][7][8][9][10][11][12]
Services
The Georgia Department of Transportation operates two welcome centers at both ends of Interstate 75 and nine rest areas, the most of any interstate highway within the state. The northbound welcome center is located between exits 2 and 5 [13] The southbound welcome center is located between exits 353 and 350.[14] The other rest areas include two in Cook County, two in Turner County, two in Dooly County, one southbound rest area in Monroe County, and two in Gordon County.[15]
History
Macon, Georgia 1955 Yellow Book with I-75 route
Early national highways
The general routing of I-75 within Georgia was originally developed as the western routing of the Dixie Highway. The western route of the Dixie Highway as designated in 1916, followed present-day US 41 south from the Tennessee border through Atlanta and Macon south to Echeconnee, Georgia. The section that would become US 41, I-75's direct predecessor, from Echeconnee south through Perry and Valdosta to the border with Florida was paved beginning in 1919 and was later designated as a part of the Dixie Highway in 1924. In 1926, the western route of the Dixie Highway following the newer Perry and Valdosta route was officially designated as US 41. By October 1929, the majority of US 41 was paved in Georgia, the only sections that were not paved at that point were between Fort Oglethorpe and Ringgold, and another on the south side of Calhoun.[16]
1950s
The highway that would eventually become I-75 in Georgia was an unnamed expressway that was open in 1951 from the southern part of Atlanta to University Avenue. It was projected from University Avenue to Williams Street in Downtown Atlanta. This expressway was open from Williams Street to what is now the northern end of the Downtown Connector. It was also proposed from the Downtown Connector to the northwest part of Atlanta.[17][18] By late 1953, this expressway was signed as US 19/US 41 as far north as Lakewood Avenue. It was under construction from the Downtown Connector to Howell Mill Road. It was proposed from Howell Mill Road to the northwest part of Atlanta.[18][19] By mid-1954, the expressway was signed as SR 295 from Lakewood Avenue to University Avenue. It was under construction from the Downtown Connector to US 41/SR 3E, just north of West Paces Ferry Road.[19][20] By mid-1955, the highway was under construction from University Avenue to Glenn Street. It was open from Williams Street to US 41/SR 3E in the central part of Atlanta.[20][21] By mid-1957, the highway was opened from University Avenue to Glenn Street. It was also open from Williams Street to US 41/SR 3E in the northwest part of Atlanta.[21][22]
1960s
By the middle of 1960, a short segment southeast of Williams Street was open.[22][2] By mid-1963, I-75 was signed. It was open from the Florida state line to US 41/SR 7 in Unadilla. It was under construction from Unadilla to just north of the Crawford–Bibb county line. It was open from SR 148 in Bolingbroke to US 23/SR 42 north-northwest of Forsyth. It was open from Glenn Street to Washington Street in Downtown Atlanta. It was under construction from US 41/SR 3 in the northwest part of Atlanta to its northern interchange with I-285. It was also under construction from SR 53 in Calhoun to the Tennessee state line.[2][3] Between 1963 and 1965, it was open from US 41/SR 7 in Unadilla to Hartley Bridge Road south-southwest of Macon. It was proposed from Hartley Bridge Road to I-16 in Macon. It was under construction from I-16 to its northern interchange with I-475 near Bolingbroke. It was open from Bolingbroke to near Forsyth. It was under construction from there to SR 155 south of McDonough. It was proposed from there to SR 54 in Morrow. It was under construction from Morrow to US 19/US 41 west of Morrow. It was proposed from that interchange to SR 331 in Forest Park. It was open from Forest Park to West Paces Ferry Road in northwest Atlanta. It was under construction from there to SR 120 in Marietta. It was proposed from Marietta to SR 140 in Adairsville. It was under construction from Adairsville to SR 53 in Calhoun. It was open from Calhoun to the Tennessee state line.[3][23] In 1966, the highway was open from the Florida state line to its southern interchange with I-475 near Macon. It was open from I-16 to US 23/SR 42 near Forsyth. It was open from Forest Park to its northern interchange with I-285.[23][24] In 1967, it was under construction from US 80/SR 74 to I-16 in Macon. It was under construction from near Forsyth to the US 19/US 41 interchange west of Morrow. It was open from Forest Park to SR 120 in Marietta. It was under construction from SR 120 to Allgood Road in Marietta.[24][25] In 1968, the highway was open US 23/SR 42 near Forsyth to SR 20 in McDonough. It was under construction from McDonough to SR 54 in Morrow. It was open from Morrow to Allgood Road in Marietta. It was under construction from US 411/SR 61 near Cartersville to SR 140 in Adairsville.[25][26] In 1969, the highway was under construction from its southern interchange with I-475 to I-16 in Macon. It was open from I-16 to Allgood Road in Marietta.[26][27]
1970s
A section of I-75 in Cartersville.
In 1971, it was open from the Florida state line to Allgood Road in Marietta.[28][29] In 1973, it was under construction from Marietta to SR 92 in Acworth.[30][31] In 1974, the highway was under construction from Emerson to US 411/SR 61 near Cartersville.[31][32] The last segment of I-75 in Georgia, located between Emerson and Cartersville, opened on December 21, 1977.[33][34]
Much of the work to widen interstates across Atlanta including I-75 from six to eight lanes and the Downtown Connector to 10 lanes including the elimination of sharp curves and grades, left-hand exits, excessive interchanges, and short acceleration/deceleration lanes, took place in the 1980s. Construction began with widening I-285 first, beginning in 1976, continued to the radiating expressways, and concluded with the depressed sections of the Downtown Connector which were completed in 1988. I-75 widening from I-285 and Aviation Boulevard to the Downtown Connector was completed by late 1984. I-75 widening from the Brookwood Interchange to the Chattahoochee River and Cobb County line was widened in the early 1980s and completed by 1985. Work on the Downtown Connector portion began in 1984, and included redesigning the massive interchange between I-20 and I-75/I-85 and the design and construction of 55 bridges over the connector portion alone.[35] The project was completed in November 1988.
In addition to the general-purpose lanes added in the 1980s, provisions for high-occupancy vehicle lanes (HOV lanes) and dedicated onramps at Williams Street, Piedmont Avenue, and Memorial Drive were built and were subsequently converted to HOV usage in 1996 on the Downtown Connector. In 1996, HOV lanes were also added from I-285 on the south side of Atlanta to I-285 on the north side of Atlanta.[citation needed]
Until 2000, the state of Georgia used the sequential interchange numbering system on all of its Interstate Highways. The first exit on each highway would begin with the number "1" and increase numerically with each exit. In 2000, the Georgia Department of Transportation (GDOT) switched to a mileage-based exit system, in which the exit number corresponded to the nearest milepost.[37][38]
In March 2007, I-75's HOV ramp serving Northside Drive in Atlanta was the site of the Bluffton University bus crash where 7 out 35 people on board the bus were killed.[39]
The highway had a lane widening project completed in 2011, allowing the entirety of the Interstate in Georgia to be three lanes in each direction.[5] On January 28, 2017, the new Peach Pass-only South Metro Express Lanes from SR 155 to SR 138 and I-675, opened.[40] On September 8, 2018, new Northwest Corridor Express Lanes from the I-285/I-75 interchange to Hickory Grove Road and from I-75/I-575 interchange to Sixes Road have opened, the lanes require a Peach Pass to use.[41]
Future
The I-75/I-16 interchange is being revamped with extra ramps to and from US 23/US 129/SR 49.[42]GDOT estimates that the final portion of the project will be bid on in 2023.
The segment of I-75 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.[43]
Exit list
Note: exit numbers along Georgia Interstates were renumbered in 1999 and 2000 to be mileage based instead of being sequential.[37][44]
Additional ramps for direct HOV lane access to/from C.W. Grant Parkway; Exit 82 (northbound) and 84 (southbound) were to C.W. Grant Parkway formerly Aviation Boulevard and Exit 85 was to US 41. Today, they are all marked as exit 239.
Exits 90 A and B were northbound only and replaced in the 1980s by a single exit 90 (currently exit 245) which was moved several blocks south and not given direct access to Georgia Avenue.
Exits 90 A and B were northbound only and replaced in the 1980s by a single exit 90 (currently exit 245) which was moved several blocks south and not given direct access to Georgia Avenue.
Northbound exit and southbound entrance; no northbound entrance to I-85 north; exit 101 went to 10th Street and exit 102 went to 14th Street before the 1980s.
250.22
402.69
101 and 102
250
16th Street, 14th Street, 10th Street
Southbound exit and northbound entrance; exit 101 went to 10th Street and exit 102 went to 14th Street before the 1980s.
^Federal Highway Administration (January 2004). "Interstate System Facts". Highway Information Quarterly Newsletter. Federal Highway Administration. Archived from the original on September 17, 2008. Retrieved November 26, 2008.
^State Highway Department of Georgia (1950). System of State Roads(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. OCLC5673161. Retrieved December 27, 2016. (Corrected to August 1, 1950.)
^ abState Highway Department of Georgia (1952). System of State Roads(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. OCLC5673161. Retrieved December 27, 2016. (Corrected to January 1, 1952.)
^ abState Highway Department of Georgia (January 1966). Official Highway Map(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. Retrieved December 27, 2016.
^ abState Highway Department of Georgia (January 1967). Official Highway Map(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. Retrieved December 27, 2016.
^ abState Highway Department of Georgia (January 1968). Official Highway Map(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. Retrieved December 27, 2016.
^ abState Highway Department of Georgia (January 1969). Official Highway Map(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. Retrieved December 27, 2016.
^State Highway Department of Georgia (January 1970). Official Highway Map(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. Retrieved December 27, 2016.
^State Highway Department of Georgia (January 1971). Official Highway Map(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. Retrieved December 27, 2016.
^State Highway Department of Georgia (January 1972). Official Highway Map(PDF) (Map). Scale not given. Atlanta: State Highway Department of Georgia. Retrieved December 27, 2016.
^Georgia Department of Transportation (January 1973). Official Highway Map(PDF) (Map). Scale not given. Atlanta: Georgia Department of Transportation. Retrieved December 27, 2016.
^ abGeorgia Department of Transportation (January 1974). Official Highway Map(PDF) (Map) (1974–1975 ed.). Scale not given. Atlanta: Georgia Department of Transportation. Retrieved December 27, 2016.
^Georgia Department of Transportation (January 1975). Official Highway Map(PDF) (Map) (1975–1976 ed.). Scale not given. Atlanta: Georgia Department of Transportation. Retrieved December 27, 2016.
^"HR 1098 - Larry McDonald Memorial Highway; designate". Resolution of February 26, 1998. Georgia House of Representatives. p. 1-2. Archived from the original on December 10, 2018. Retrieved June 15, 2021.
^Georgia Department of Transportation (1980). Official Highway and Transportation Map(PDF) (Map) (1980–1981 ed.). Scale not given. Atlanta: Georgia Department of Transportation.
^Georgia Department of Transportation (2021). "I-75 @ CR 312/Bethlehem Road". Georgia Department of Transportation. Retrieved June 15, 2021.
I-75 at Florida state line
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