page_title: Georgia State Route 400
section_title: Route description
hierarchical_section_title: Georgia State Route 400 / Route description
caption_attribution_description: English: Underpass on 400 Southbound under Buckhead.
context_page_description: Georgia State Route 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 from exit 4 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 Interstate 85, to just south-southeast of Dahlonega. Like the Interstate highways, it is a limited-access road, but unlike the interstates, the exit numbers are not mileage-based, they are sequential. Once SR 400 passes exit 17, it changes from a limited-access freeway into an at-grade divided highway with traffic lights, but still with a high speed limit of 65 miles per hour, 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 and beyond, the highway is designated "Turner McDonald Parkway".
context_section_description: 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, Dunwoody, Roswell, Alpharetta, and Johns Creek 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.
  SR 400's exit 6 at Northridge Road is known as the Mayor Eva Cohn Galambos Memorial Interchange.
  From SR 400's exit 8, Mansell Road, to exit 11, Windward Parkway, North Point Parkway travels parallel to the east of SR 400. North Point Parkway provides access to North Point Mall.
  SR 400 enters Forsyth County at the overpass of McGinnis Ferry Road. In the county, SR 400 travels through Cumming and Coal Mountain. Major interchanges include SR 141 (exit 13), SR 20 (exit 14A/14B on SR 400 northbound; exit 14 on SR 400 southbound), SR 306 (exit 17), and SR 369. SR 400's limited-access portion ends at SR 369, and SR 400 continues on.
  Travelers can access Bald Ridge Marina and boat ramps for Lake Lanier via exits 15 (Bald Ridge Marina Road) and 16 (Pilgrim Mill Road).
  North of SR 400's intersection with Jot Em Down Road, SR 400 continues into Dawson County, where it travels through Dawsonville. Major intersections include SR 53 and SR 136.
  At the intersection of SR 400 and SR 53, a continuous-flow intersection was completed in May 2017. Near this intersection is the entrance to North Georgia Premium Outlets.
  SR 400 continues into Lumpkin County just south of its intersection with Whelchel Road and Wilson Drive. After traveling 3.7 miles (6.0 km) in the county, SR 400 and US 19 meet SR 115 from the north and SR 60 from the east. SR 400 ends at this point, and US 19 turns left and continues north through downtown Dahlonega into the Appalachian Mountains and the Chattahoochee–Oconee National Forest.
  All of SR 400 south of the Dawson–Lumpkin county line is included as part of the National Highway System, a system of roadways important to the nation's economy, defense, and mobility.
  Exits on the controlled-access part of SR 400 are numbered according to the consecutive numbering system instead of reference post (i.e. mile-based) numbering. This is unlike the Interstates in Georgia, which have used reference post numbering since 2000. This means that exit numbers on SR 400 start at 1 and use consecutive numbers (2, 3, 4, etc.) regardless of the nearest mile marker.
  At the southern terminus, new ramps connecting SR 400 south to I-85 north and I-85 south to SR 400 north opened on April 2, 2014. The project was two years in the making and was paid for with funds from the SR 400 toll plaza. Prior, drivers had to exit off SR 400 onto Sidney Marcus Boulevard to get to I-85 north. On I-85 south, drivers had to take the Cheshire Bride Road/Lenox Road exit to get to Sidney Marcus Boulevard for access onto SR 400 north. The ramp from I-85 south is shared with the SR 13 ramp (exit 86). From SR 400, Sidney Marcus Boulevard is now exit 1B and the ramp to I-85 north is 1A.
  In Forsyth County in 2017-2018, SR 400 was expanded from two lanes to three from McFarland Parkway to SR 369 (which is planned to be exit 18).
caption: Passing through the Atlanta Financial Center in Buckhead on SR 400 southbound
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