The following road and lane closures are currently active and listed on the Cobb County DOT website. To expand the map for a particular roadway, click on the legend to the left of the interactive map below. The tables below are copied and pasted directly from the Cobb DOT GIS app. We retrieved this current list on February 4, 2026.
We post this every Wednesday. To check for updates that occur between our posting, visit the Cobb DOT’s road work page at this link.
Road closures
Marble Mill Rd.
| Construction Closure Starts: 12/15/25 9:00 AM Ends: 3/5/26 4:00 PM |
| Status: Active Details: Both Directions closure on Marble Mill Rd. Water main installation. |
| Contact: Unity Construction Co., Inc. 770-943-9886 |
| Detour: Follow the detour. |
Mars Hill Church Rd. NW
| Construction Closure Starts: 10/6/25 9:00 AM Ends: 4/23/26 4:00 PM |
Greers Chapel Dr
| Construction Closure Starts: 10/7/25 9:00 AM Ends: 3/31/26 4:00 PM |
| Status: Active Details: Both Directions closure on Greers Chapel Dr. Utility Relocations. |
| Contact: Gary Stanley 770-403-0206 |
| Detour: Follow Posted Detour |
Lane closures
Circle 75 Parkway
| CONSTRUCTION Closure Starts: 1/20/26 9:00 AM Ends: 3/1/26 4:00 PM |
| Status: Active Details: Both Directions closure on Circle 75 Parkway. GA Power Utility Construction Lane Closure |
Lower Roswell Road
| CONSTRUCTION Closure Starts: 11/20/24 9:00 AM Ends: 11/19/26 4:00 PM |
| Status: Active Details: One Direction closure on Lower Roswell Rd. Lane Closures possible for Safety Improvement Project on Lower Roswell Rd |
| Contact: Cobb DOT 770-528-1600 |
| Detour: |
Mars Hill Church Road
| CONSTRUCTION Closure Starts: 8/1/25 9:00 AM Ends: 7/31/26 4:00 PM |
| Status: Active Details: One Direction closure on Mars Hill Church Rd. Cobb County Marietta Water Authority Water Wain Replacement Project Lane Closure. |
| Contact: Cobb County Marietta Water Authority 770-514-5201 pipelineproject@ccmwa.org |
| Detour: |
Old Floyd Road
| CONSTRUCTION Closure Starts: 7/16/25 9:00 AM Ends: 1/6/27 4:00 PM |
| Status: Active Details: One Direction closure on Old Floyd Rd. Cobb DOT Bridge Widening Project |
| Contact: Cobb DOT Construction 770-528-1600 |
About the Cobb County Department of Transportation
When a county’s Department of Transportation is mentioned, what’s the first thing that comes to mind?
If you’re like most people, it’s probably the maintenance of county roads and traffic signals. Cobb DOT is certainly responsible for that.
But there are other aspects of a transportation system than just making sure cars don’t fall into potholes and traffic signals work. The department is involved in the construction of the county’s impressive trail network, the operation of the Cobb County International Airport-McCollum Field, and planning for future transportation needs. Cobb DOT engineers also provide the Cobb County Planning Commission and the Board of Commissioners with information on the likely traffic impact of decisions at zoning hearings.
The Cobb DOT director, currently Drew Raessler, attends nearly every Board of Commissioners meeting and requests permission and funding for a wide range of projects.
The Cobb County DOT website describes the responsibilities of the department as follows:
The Cobb County Department of Transportation (DOT) develops, manages, and operates Cobb County’s transportation system. This system includes a vast network of roadways, sidewalks, and trails; a transit system that provides public transportation; and an airport that serves business and recreational flying needs.
The Director and Deputy Director oversee all functions of the Cobb DOT.
Cobb DOT consists of several divisions, including engineering, traffic operations, planning, airport, transit, and road maintenance. It also includes support services, which is a general designation for services that support Cobb DOT across all divisions.
To read news about the Cobb DOT published in the Cobb County Courier, please follow this link.
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