Building a Better Commute
Your guide to navigating projects and construction in Perimeter.
Keep a pulse on major transportation projects currently underway in Perimeter.
Keep a pulse on major transportation projects currently underway in Perimeter.
Transform 285 / 400 Project 285 Lane Reductions
Construction Timeline:
Late summer 2022 – TBD
Traffic Changes:
The I-285 Lane Reductions will not continue as planned for this year and are now scheduled to begin in Late summer 2022. In the meantime, crews will complete work activities throughout the project corridor to provide as much relief as possible before the most painful part of the project.
Transform 285 / 400 Project
Construction Timeline:
2018 – Summer 2023
Traffic Changes:
Lane closures will take place on I-285 and SR 400. Anticipate possible delays, reduced speeds, and detours in some areas.
Daytime traffic pacing may take place occasionally on I-285 eastbound from Roswell Road to Perimeter Center Parkway, I-285 westbound from Chamblee Dunwoody Road to Perimeter Center Parkway, and Perimeter Center Parkway from Lake Hearn Drive to Hammond Drive.
More Information:
GDOT maintains a project website here.
Most Recent Update:
Abernathy Road Diverging Diamond Interchange (DDI)
Construction Timeline:
June 2019 – Summer 2023
Traffic Changes:
Closure of one westbound turn lane on Abernathy Road, turning south onto SR 400. Additional modifications are possible in the future and will be shared once available.
Most Recent Update:
Peachtree Dunwoody Road & 285 Bridge Replacement
Construction Timeline:
April 2019 – Winter 2022
Traffic Changes:
Closure of one northbound lane on Peachtree Dunwoody Road as it passes under I-285. This modification is intended to be constant through the end of the Transform 285/400 project.
More Information:
In addition to replacing and widening the stretch of I-285 that crosses overhead, this project is providing a section of trail that will allow PATH400 to reach the Perimeter area.
Glenridge Drive & I-285 Bridge Replacement
Construction Timeline:
February 2019 – Winter 2022
Traffic Changes:
Closure of one southbound lane on Glenridge Drive as it passes under I-285. This modification is intended to be constant through the end of the Transform 285/400 project.
More Information:
This project will create an additional turn lane onto I-285 westbound and separate left-turning traffic from northbound traffic on Glenridge. It will also create space for the collector-distributor lanes to pass overhead.
Mt. Vernon Highway Bridge Replacement
Construction Timeline:
2018 – Summer 2022
Traffic Changes:
One lane of travel in each direction on Mt. Vernon Hwy will be in place during construction; phase one of the bridge will be completed and traffic will be routed onto the new bridge. From there, the phase two bridge will be built.
More Information:
The first phase has been completed and the second phase is nearing completion, on target to finish summer of 2022
Most Recent Update:
GA-400 Express Lanes
Construction Timeline:
2023-2029
Traffic Changes:
TBD – Project in design phase.
More Information:
More project information available here.
Path 400 Extension South from Glenridge to Buckhead
Construction Timeline:
TBD
Traffic Changes:
TBD – Project in design phase.
More Information:
The project will provide a bike/pedestrian route that runs more than 5 miles and serves as a greenway that connects Buckhead to Perimeter. Path 400 will eventually join the Atlanta Beltline, providing a key link to the regional trail network.
I-285 Top End Express Lanes
Construction Timeline:
2025-2035
Traffic Changes:
TBD – Project in conception phase.
More Information:
The project will add two new at-grade, elevated, and barrier-separated express lanes in both directions on I-285 between I-20 on the western side and I-20 on the eastern side. The project is planned as segments, with a segment from Raider Drive west to Atlanta Road, another from North Shallowford east to I-20, and a central segment spanning Raider to North Shallowford and north along GA-400 to North Springs Station. The entire corridor will be barrier-separated express lanes (like those on I-75), and is planned to be delivered in a staggered process over the next 10-15 years.
Additional information is available here.
SR 400 Northbound Shared-Use Path
Construction Timeline:
2023
Traffic Changes:
None
More Information:
The Transform 285/400 Improvement Project will add nearly one mile of a shared-use path to the Perimeter area. The shared-use path will accommodate both bicyclists and pedestrians and will run along SR 400 northbound, with access points at Johnson Ferry Road and Peachtree Dunwoody Road.
Workplace construction resources
Spread the Word
Print and post this Transform 285/400 project fact sheet at your workplace.
Construction-related travel delays can be frustrating, but you can make it a breeze for your employees. Discover simple steps, easy-to-understand strategies and commute support services in our field guide.
Roll Out A Commuter Benefit Program
Guide your employees on alternative ways to work.