BUILDING A BETTER COMMUTE

Your guide to navigating projects and construction in Perimeter.

Keep a pulse on major transportation projects currently underway in Perimeter.

Easily share with your team the projects that impact your workplace by clicking the email icon next to each project.

Transform 285 / 400 Project

Construction Timeline:

2018 – December 2020

Traffic Changes:

Lane closures will take place on I-285 and SR 400. Anticipate possible delays, reduced speeds, and detours in some areas.

Starting Jan. 31, 2020, expect overnight road closures from 9 PM – 5 AM.

Traffic pacing will take place during the daytime 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 – December 2020

Traffic Changes:

Closure of one westbound turn lane on Abernathy Road, turning south onto GA-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 – December 2020

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:

The purpose of the project is to add sidewalks on either side of the road.

Glenridge Drive & I-285 Bridge Replacement

Construction Timeline:

February 2019 – December 2020

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:

Project is adding an addition of an I-285 westbound turning lane and an extra lane for southbound Glenridge Drive

Mt. Vernon Highway Bridge Replacement

Construction Timeline:

2018 – 2020

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 is wrapping up. GDOT is preparing to switch traffic to a new bridge on Mount Vernon Highway and demolishing the old bridge. The second phase will begin in Q2 2020.

Most Recent Update:

GA-400 Express Lanes

Construction Timeline:

2021-2027

Traffic Changes:

TBD – Project in design phase.

More Information:

More project information available here.

Path 400 Extension

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.

285 Merged Lanes (Express Lane)

Construction Timeline:

2022 – 2032

Traffic Changes:

TBD – Project in conception phase.

More Information:

Project will add two new at-grade, elevated, and barrier-separated express lanes in both directions on I-285 between Paces Ferry Rd and SR 400 westbound, between Henderson Rd and SR 400, and north on SR 400 from the Glenridge Connector to the North Springs MARTA station.

Construction Timeline:

2018 – December 2020

Traffic Changes:

Lane closures will take place on I-285 and SR 400. Anticipate possible delays, reduced speeds, and detours in some areas.

Starting Jan. 31, 2020, expect overnight road closures from 9 PM – 5 AM.

Traffic pacing will take place during the daytime 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:
Construction Timeline:

June 2019 – December 2020

Traffic Changes:

Closure of one westbound turn lane on Abernathy Road, turning south onto GA-400. Additional modifications are possible in the future and will be shared once available.

GDOT maintains a project website here.

Most Recent Update:
Construction Timeline:

April 2019 – December 2020

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.

Project Purpose:

Add sidewalks on either side of the road.

Construction Timeline:

February 2019 – December 2020

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:

Project is adding an addition of an I-285 westbound turning lane and an extra lane for southbound Glenridge Drive

Construction Timeline:

April 2018 – December 2019

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.

Project Update:

The first phase is wrapping up. GDOT is preparing to switch traffic to a new bridge on Mount Vernon Hwy and demolishing the old bridge. The second phase will begin in Q2 2020.

More Information:
Construction Timeline:

2021-2024

Traffic Changes:

TBD – Project in design phase.

More Information:

More project information available here.

Construction Timeline:

TBD

Traffic Changes:

TBD – Project in design phase.

Purpose:

To provide a connection through the interchange for planned bike and pedestrian facilities.

More Information:

Bike/pedestrian route that will run more than 5 miles and will serve 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.

Construction Timeline:

2022 – 2032

Traffic Changes:

TBD – Project in conception phase.

More Information:

Project will add two new at-grade, elevated, and barrier-separated express lanes in both directions on I-285 between Paces Ferry Rd and SR 400 westbound, between Henderson Rd and SR 400, and north on SR 400 from the Glenridge Connector to the North Springs MARTA station.

Workplace Construction Resources

Spread the Word

Print and post this Transform 285/400 project fact sheet at your workplace.

Navigate Construction in Perimeter

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.