Georgia State Route 400

Georgia Highway 400 (always known locally as Georgia 400) is a highway in the U.S. state of Georgia that goes from Atlanta at I-85 to Buckhead, Sandy Springs, Roswell, Alpharetta, Forsyth County, Dawson County, and Dahlonega. Like the interstate highways, it is a limited access road (with exit ramps instead of intersections), but unlike the interstates (which were renumbered by the GDOT in 2000), the exit numbers do not indicate mileage, they still go up sequentially one-by-one.

The southern section of Georgia 400 (from I-285 to I-85) was built last, and is currently the only toll road remaining in Georgia. Built in the 1990s, this section was fought bittery by residents, who eventually ended up having their homes and large parts on their neighborhoods destroyed for the construction. Many remaining residents now live on dead end streets with significant noise pollution. Existing exits were renumbered up by four to accommodate the extension, which has a single toll booth in the middle of its length, accepting change or cruise cards. There is also currently no way to go from 400 south to 85 north or vice versa, except by a confusing route via Sidney Marcus Boulevard.

Exits

Buckhead

• Interstate 85 South (SR 403 South)/Downtown Atlanta/Atlanta Airport/to Interstate 75 (SR 401) (N/A)
• Sidney Marcus Boulevard to Interstate 85 North (SR 403 North)/Greenville (1)
• Lenox Road (SR 141 Connector) to Piedmont Road (SR 237)/to Peachtree Road (SR 141) (2)

Sandy Springs

• Glenridge Connector (SR 407 Loop) to Johnson Ferry Road/to Peacthree-Dunwoody Road (3)
• Interstate 285 (SR 407)/Chattanooga/Birmingham/Greenville/Augusta (4A/4B)
• Abernathy Road/Dunwoody/Sandy Springs/Marta Parking (5/5A/5B/5C)
• Northridge Road (6)

Roswell

• Holcomb Bridge Road (SR 140)/Roswell/Norcross (7/7A/7B)

Alpharetta

• Mansell Road (8)
• Haynes Bridge Road (9)
• Old Milton Parkway (SR 120) (10)
• Windward Parkway (11)

Forsyth County

• McFarland Road (12)
• Peachtree Parkway (SR 141) (13)
• SR 20/Buford/Cumming (14)
• Bald Ridge Marina Road (15)
• Pilgrim Mill Road (16)
• Keith Bridge Road (SR 306)/Gainesville (17)

Lumpkin County

• Dahlonega