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Georgia State Route 400
State Route 400 (SR 400; commonly known as Georgia 400) is a freeway and state highway in the U.S. state of Georgia serving parts of Metro Atlanta. It is concurrent with U.S. Route 19 (US 19) from exit 4 (Interstate 285 [I-285]) until its northern terminus south-southeast of Dahlonega, linking the city of Atlanta to its north-central suburbs and exurbs. SR 400 travels from the Lindbergh neighborhood in the Buckhead district of Atlanta, at I-85, to just south-southeast of Dahlonega. Like the Interstate Highways, it is a limited-access road (with interchanges instead of intersections), but unlike the Interstates, the exit numbers are not mileage-based, they are sequential. Once SR 400 passes exit 18 (SR 369), it changes from a limited-access freeway into an at-grade divided highway with traffic lights, but still with a speed limit of 65 miles per hour (105 km/h), and ends at the J. B. Jones Intersection at SR 60/SR 115 in Lumpkin County.
Between I-85 and I-285, SR 400 is designated "T. Harvey Mathis Parkway", after a local land developer and road proponent who died the day after being appointed as head of the Atlanta Committee for the Olympic Games in June 1991, when the tollway was under construction. Upon reaching the Perimeter (I-285) and beyond, the highway is designated "Turner McDonald Parkway", after a Fulton County Public Works Department director.
SR 400 is one of only two state routes in the 400–499 series to not be designated as an unsigned route following an Interstate; the other is SR 410 near Stone Mountain.[citation needed] Both SR 400 and SR 410 were originally planned as interstate routes: SR 400 was supposed to be I-485 and SR 410 was supposed to be I-675.
SR 400 begins at I-85 just north of Downtown Atlanta. SR 400 travels concurrently with MARTA's Red Line between its Buckhead and Medical Center stops; the Red Line's final stop is at the North Springs station. SR 400 southbound can access the station via Exit 5C, and traffic from the station can enter SR 400 northbound.
SR 400 goes through a tunnel under the Atlanta Financial Center in Buckhead, south of SR 400's exit 2 (SR 141 Connector/Lenox Road). Farther north, SR 400 meets I-285, also known as "The Perimeter" or "Atlanta Bypass".
At I-285, SR 400 meets with US 19. The two travel concurrently until an intersection with SR 60 and SR 115 in Dahlonega.
North of I-285, SR 400 travels through Sandy Springs, Roswell, and Alpharetta in Fulton County. Major junctions include SR 140 (exit 7A/7B on SR 400 northbound and exit 7 on SR 400 southbound) and SR 120 (exit 10).
From US 19 and I-285 in Sandy Springs, SR 9 travels parallel to SR 400 to the west until SR 9 reaches Coal Mountain. In Coal Mountain, SR 9 veers northwest away from SR 400, but then later turns northeast toward its northern terminus at its intersection at US 19 in downtown Dahlonega.
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Georgia State Route 400
State Route 400 (SR 400; commonly known as Georgia 400) is a freeway and state highway in the U.S. state of Georgia serving parts of Metro Atlanta. It is concurrent with U.S. Route 19 (US 19) from exit 4 (Interstate 285 [I-285]) until its northern terminus south-southeast of Dahlonega, linking the city of Atlanta to its north-central suburbs and exurbs. SR 400 travels from the Lindbergh neighborhood in the Buckhead district of Atlanta, at I-85, to just south-southeast of Dahlonega. Like the Interstate Highways, it is a limited-access road (with interchanges instead of intersections), but unlike the Interstates, the exit numbers are not mileage-based, they are sequential. Once SR 400 passes exit 18 (SR 369), it changes from a limited-access freeway into an at-grade divided highway with traffic lights, but still with a speed limit of 65 miles per hour (105 km/h), and ends at the J. B. Jones Intersection at SR 60/SR 115 in Lumpkin County.
Between I-85 and I-285, SR 400 is designated "T. Harvey Mathis Parkway", after a local land developer and road proponent who died the day after being appointed as head of the Atlanta Committee for the Olympic Games in June 1991, when the tollway was under construction. Upon reaching the Perimeter (I-285) and beyond, the highway is designated "Turner McDonald Parkway", after a Fulton County Public Works Department director.
SR 400 is one of only two state routes in the 400–499 series to not be designated as an unsigned route following an Interstate; the other is SR 410 near Stone Mountain.[citation needed] Both SR 400 and SR 410 were originally planned as interstate routes: SR 400 was supposed to be I-485 and SR 410 was supposed to be I-675.
SR 400 begins at I-85 just north of Downtown Atlanta. SR 400 travels concurrently with MARTA's Red Line between its Buckhead and Medical Center stops; the Red Line's final stop is at the North Springs station. SR 400 southbound can access the station via Exit 5C, and traffic from the station can enter SR 400 northbound.
SR 400 goes through a tunnel under the Atlanta Financial Center in Buckhead, south of SR 400's exit 2 (SR 141 Connector/Lenox Road). Farther north, SR 400 meets I-285, also known as "The Perimeter" or "Atlanta Bypass".
At I-285, SR 400 meets with US 19. The two travel concurrently until an intersection with SR 60 and SR 115 in Dahlonega.
North of I-285, SR 400 travels through Sandy Springs, Roswell, and Alpharetta in Fulton County. Major junctions include SR 140 (exit 7A/7B on SR 400 northbound and exit 7 on SR 400 southbound) and SR 120 (exit 10).
From US 19 and I-285 in Sandy Springs, SR 9 travels parallel to SR 400 to the west until SR 9 reaches Coal Mountain. In Coal Mountain, SR 9 veers northwest away from SR 400, but then later turns northeast toward its northern terminus at its intersection at US 19 in downtown Dahlonega.