Building a Better Commute

Your guide to navigating construction in Perimeter.

Bookmark this page to keep a pulse on major transportation projects currently underway in Perimeter and construction-related alerts.

Rendering: Transform 285/400

Transform 285/400 Project

Led by the Georgia Department of Transportation, the I-285 at GA 400 interchange is undergoing a major upgrade over a 4-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 2020.

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10.5 MILES

includes 4.3 miles of upgrades on I-285, from Roswell Road to Ashford Dunwoody Road, and 6.2 miles on GA 400, from Glenridge Connector to Spalding Drive.


The project kicked off in February 2017 and is expected to be completed in Summer 2020.


in construction upgrades to improve travel conditions and access on the interchange.

20,000 HOURS

Improvements are estimated to save GA 400 and I-285 travelers this total amount each day