Alpharetta, Georgia – A major transportation project set to reshape one of North Georgia’s busiest corridors is about to move from planning into action, as construction on the SR 400 Express Lanes is scheduled to begin in April 2026.
Local officials in Alpharetta are notifying residents and daily commuters that the Georgia Department of Transportation will soon roll out the first phase of work along the 16-mile stretch of SR 400. The initial focus will center on the segment between McGinnis Ferry Road and McFarland Parkway, an area expected to see the earliest signs of activity.
In the opening weeks, the transformation may appear gradual. Crews will begin positioning equipment, marking off work zones, and preparing the corridor for more intensive construction. While the early stage is not expected to bring major disruptions, drivers will likely notice subtle but steady changes, lane adjustments, temporary signage, and the first hints of a shifting traffic flow…