Interstate 675 Georgia
Interstate 675 (Georgia State Route 413) provides an alternate route to I-75 northward from Stockbridge in Henry County to the Perimeter Highway (I-285) in southwest DeKalb County. The freeway doubles as a commuter route for unincorporated suburbs in Clayton County while serving redevelopment of Fort Gillem to the west. I-675 appears rural with a wide median and only four lanes north from I-75 to the Double Bridge Road overpass, and six lanes from Forest Parkway north to I-285.
Road work scheduled for 2023 will modify the exchange joining Interstate 285 with Bouldercrest Road into a parclo interchange. Associated work adds a new distributor roadway from Bouldercrest Road to Interstate 675 south, separating weaving traffic movements from the Perimeter Highway westbound mainline.
Interstate 675 was originally planned to be part of a longer route, as part of a proposed I-475 / State Route 400 freeway that would have extended north of I-285 through the east side of Atlanta. The route was envisioned to run to the south end of U.S. 19/SR 400 (North Fulton Expressway) at I-285 in Sandy Springs. The northern third of this highway was constructed as the tolled extension of SR 400. The remainder between I-285 in DeKalb County and I-85 at Lindbergh in Atlanta was never built.
Interstate 675 was applied to the route between I-75 at Stockbridge and I-285 in DeKalb County as approved by the American Association of State Highway and Transportation Officials (AASHTO) on June 17, 1975. Construction of I-675 commenced in December 1982, but was halted when a subcontractor defaulted on work in 1985, resulting in a new bidding process and other complications. These events delayed completion of I-675 until October 30, 1987. The freeway cost $61.6 million to complete.1
Source: January 26, 2022 Interstate Route Log and Finders List
The adjacent diamond interchange between I-285 (Perimeter Highway) and U.S. 23/SR 42 (Moreland Avenue) was modified with construction of the directional T interchange with Interstate 675. Ramps were added to consolidate movements from I-675 north and I-285 west to U.S. 23 and from U.S. 23 north to I-285 north and I-675 south.
Construction of the I-75 South Metro Express Lanes included new ramps joining the managed lanes along Interstate 75 with the south end of I-675 at Stockbridge. Construction on the overall $176 million project kicked off in October 2014. A ribbon cutting ceremony preceded the January 28, 2017 opening of the toll lanes. They run 12 miles along I-75 southeast from SR 138 (Stockbridge Highway) to SR 155 (McDonough Road).2
North End – near Conley, Georgia
A pair of end shields are posted as the roadways of Interstate 675 separate toward I-285 at the Henrico Road underpass. 09/06/20 and 05/28/05
North End Throwback
The original button copy signs for Interstate 285 on I-675 north were carbon copied by 2003. Photos by Jim K. Georges (05/29/99).
South End – Stockbridge, Georgia
Two lanes default onto the southbound mainline of Interstate 75 from I-675 while a left exit ramp joins the Express Lanes to McDonough. 09/11/20 and 06/30/17
Exit 227 separates from I-75 north with two lanes for Stockbridge, Ellenwood and Gresham Park. The north end of I-675 ties into I-285, six miles west of I-20 near Panthersville. Birmingham joins Atlanta as a control city for I-75 north, referencing the I-285 inner loop to I-20 in West Atlanta. 05/06/22
- “I-675 open to traffic.” The Atlanta Journal and The Atlanta Constitution (GA), November 5, 1987.
- “GDOT Celebrates the Completion of the I-75 Express Lanes at Ribbon Cutting.” Georgia Department of Transportation, announcement. January 26, 2017.
Page updated September 17, 2022.