Pathway to an Improved Commute
The latest updates and news on Transform 285/400 and its transportation impacts in Perimeter
Under Construction: Transform 285/400

Rendering: Transform 285/400
Led by the Georgia Department of Transportation, the I-285 at GA 400 interchange is undergoing a major upgrade over a multi-year coordinated construction period that will add roadway capacity, improve traffic flow, safety and access, and generate opportunity for new investment in the Perimeter area. Construction for the project is scheduled for completion in 2023.

24/7 Lane Closures on I-285 Begin Early October
The Transform 285/400 transportation project will soon enter its most transformative stage. To complete construction of the 285/400 improvements and replace a series of 50-year-old bridges along I-285, the Georgia Department of Transportation (GDOT) will close two left-hand lanes in each direction of I-285, between Roswell Road and Ashford Dunwoody Road. This closure is slated to begin as early as Saturday, Oct. 8 and will last until the project’s completion sometime in the second half of 2023. Parallel collector-distributor lanes being built as part of the Transform project should help to absorb some of this disruption and smooth merging in the area. Once completed, the 285/400 interchange will be able to handle more vehicles with less delay, providing a better experience for those coming to Perimeter or passing through on I-285 or GA-400.
Now Open: New Access Ramp for Ashford Dunwoody Road
285 Lane Closure FAQ
Lane closure completion: Currently projected for latter half of 2023
Where? Two interior lanes will be closed first; closed lanes will shift as work shifts to next segments of the bridge replacements.
When? Lanes will be closed 24/7 to allow disassembly and replacement of the existing bridge structures
Why are they doing this? I-285 is 50 years old, and the bridge sections are due for replacement to ensure their safety. This work has been included in the 285/400 reconstruction to save money and reduce construction impacts on the community
For detailed project issues, concerns, or questions please contact the Georgia Department of Transportation directly at transform285400@dot.ga.gov
Construction Radar
285 Westbound to Collector-Distributor Lane to Roswell Road

285 Eastbound to Ashford Dunwoody

285 Westbound to 400 Northbound

285 West to 400 Southbound

400 Southbound to 285 West/East including Ashford Dunwoody

Know when to drive on I-285

