Cobb County Government


Windy Hill Road LogoCobb County DOT is working on five-part major transportation improvement project that will improve safety and mobility along a 1.95-mile section of Windy Hill Road.

Project Update

Delays in the Windy Hill corridor are increasing.

Expect severe traffic congestion and delays associated with multiple lane closures. Please plan accordingly and seek alternative routes for through travel. Follow Cobb DOT on FacebookTwitter, and check for up-to-the-minute traffic 24/7.

Latest News

Windy Hill Road lane shift at 1-75 overpass begins Jan. 30

Beginning Monday, Jan. 30, 2017, the eastbound travel lanes on Windy Hill Road at the I-75 overpass will shift further right along the south side of the bridge as crews barricade the center of the roadway for construction of walls and sidewalk.

Project Overview

WindyHillProjects webClick to enlarge the image.

Total estimated cost for these projects is over $48 M.

Projects E4030, E4020 and D4230 were advertised for construction bids on July 18, 2014. Bids were opened on Sept. 11, 2014.  CMES, Inc. was the low bidder at $15,176,755.02 for projects E4030, E4020 and D4230. Construction began in late October 2014. Construction duration will be 24 months.

Project Specifics

Windy Hill West Project E4030

Estimated Cost: $14,780,000

Project length: 0.74 miles

This existing 5-lane section of roadway has a center left turn lane with a high accident rate.  Traffic crashes in this section have increased as motorists attempt to cut in and across the two way center left turn lane.  This project will add a median and an additional west and east bound lane.  Existing sidewalks will be replaced.


public meeting on Project E4100 was held on April 7, 2014 at the Cobb Chamber of Commerce, Community Room, 240 Interstate North Parkway, Atlanta, GA 30339. Open House Notice alt 

An open house on the construction of the Windy Hill Road Corridor Projects was held on Sept. 16, 2014 from 3 p.m. to 7 p.m. at the Windy Hill Community Center located at 1885 Roswell Street, Smyrna, Georgia 30080.