BUILDING A BETTER COMMUTE

Your guide to navigating projects and construction in Perimeter.

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

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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.

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 – December 2020

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 – 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:

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 – 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:

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 – 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 will be completed in Q1 of 2020. GDOT will then switch traffic to the completed bridge and replace the old bridge. This second phase will begin in Q2 of 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 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.

285 Merged Lanes (Express Lane)

Construction Timeline:

2022 – 2032

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 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.

Additional information is available here.

SR 400 Northbound Shared-Use Path

Construction Timeline:

TBD

Traffic Changes:

TBD

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.

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.

Construction Timeline:

TBD

Traffic Changes:

TBD

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.

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