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.
As the pace of construction increases, those changes will become more pronounced. Motorists traveling through the corridor should be ready for evolving conditions, including periodic traffic shifts and brief delays. Even small adjustments in lane configurations can ripple through a heavily traveled route, making attentiveness behind the wheel especially important.
City leaders are encouraging drivers to approach the area with added caution and patience. Staying alert to posted signs and giving extra space around work crews will help maintain safety as construction progresses. Building in a little extra travel time is also advised, particularly during peak commuting hours when even minor slowdowns can quickly add up.
For those looking to stay ahead of the changes, real-time traffic updates and alternate route suggestions are available through Georgia 511. These tools are expected to play a key role in helping drivers navigate the corridor as conditions shift from week to week.
The timeline for the project remains flexible, with weather and other factors capable of influencing the pace of work. Updates will continue to be shared as construction advances, offering the public a clearer picture of what to expect next as the SR 400 Express Lanes begin to take shape.
