A ceremonial groundbreaking for the I-285/Ga. 400 interchange reconstruction project is slated for Nov. 3, according to the state Department of Transportation. But early preparation work is already underway, and major construction affecting traffic likely won’t begin until February, according to GDOT spokesperson Jill Goldberg.
The groundbreaking will feature Gov. Nathan Deal and GDOT Commissioner Russell McMurry, among other officials. Its location is still to be determined, according to Goldberg.
The contracting team on the project, North Perimeter Contractors, is currently conducting such surveying and exam work as inspecting storm drains and culverts, Goldberg said.
Besides rebuilding the interchange to improve traffic flow and capacity, the project will add “collector-distributor lanes”—physically separated exit and entrance lanes—to 400 north to Sandy Springs’ Spalding Drive and to 285 between Sandy Springs’ Roswell Road and Ashford-Dunwoody Road in Dunwoody and Brookhaven. The 400/Abernathy Road interchange in Sandy Springs will be rebuilt as a “diverging diamond,” where traffic flow directions change in time with traffic lights to move cars through faster.