ALPHARETTA, Ga. — Commuters in the North Fulton and south Forsyth areas are finally seeing relief at one of the region’s most notorious traffic bottlenecks. The Georgia Department of Transportation (GDOT) has officially opened the new full diamond interchange at Georgia 400 and McGinnis Ferry Road.
The long-awaited project, which officially opened to traffic on Thursday, June 25, 2026, represents the culmination of five years of construction and multi-jurisdictional planning.
Commuters can now access Georgia 400 northbound and southbound directly from McGinnis Ferry Road, and exit the highway directly onto the local corridor.
Relieving Pressure on Local Interchanges
Before the opening, drivers in the fast-growing cities of Alpharetta, Johns Creek, and Suwanee had to route through heavily congested intersections at either Windward Parkway (Exit 11) to the south or McFarland Parkway (Exit 12) to the north to access Georgia 400.
Local officials expect the new interchange to significantly reduce the daily burden on those two neighboring junctions.
In addition to adding the four highway access ramps, the project included several major local upgrades:
- Road Widening: McGinnis Ferry Road has been widened from two to four lanes through the immediate interchange area.
- Pedestrian Access: New concrete sidewalks and a multi-use path have been constructed along McGinnis Ferry Road to improve access for walkers and cyclists.
- Signal Improvements: Modern traffic signals have been installed at the ramp intersections to optimize local flow.
“This interchange is a critical piece of infrastructure that will reshape how people move through North Fulton and Forsyth County. It is the result of years of coordination and a shared commitment to improving mobility for our residents.”
— GDOT Project Manager
Partnerships and Future-Proofing
The project was funded and executed through a partnership between GDOT, the City of Alpharetta, the City of Johns Creek, and Forsyth County. This collaborative approach allowed the project to address both state highway needs and local arterial traffic concerns.
Notably, the new McGinnis Ferry Road bridge over Georgia 400 has been designed to accommodate future express lanes. As part of GDOT’s long-term plan to add toll lanes along the GA 400 corridor, the bridge supports future widening and ramp configurations without requiring another full teardown.
What Drivers Should Expect
While the interchange is fully open and functional, GDOT officials cautioned that minor construction work will continue in the surrounding area through the upcoming week. Crews will remain active along the highway shoulders and medians to perform final cleanup, landscaping, and minor utility work.
Drivers are urged to stay alert, slow down, and watch for work zones and personnel during this final phase.
Real-time travel updates, lane closures, and construction alerts remain available through 511ga.org or the 511GA mobile app.
Aisha Bell is a Business & Economy Reporter for WACN 21, covering the Atlanta economy — from the data-center boom reshaping the Georgia power grid to small businesses. Reach her at abell@wacn21.com.
