Alpharetta, Georgia – Construction activity along SR 400 is poised to pick up again in March, marking another visible step forward in the long-anticipated express lanes expansion through north Fulton. The early phase of work signals renewed momentum on a project that will ultimately deliver 16 miles of new express lanes linking Forsyth and Fulton counties, reshaping one of the region’s busiest corridors.
In the weeks ahead, crews with the Georgia Department of Transportation will begin tree clearing and other preparatory efforts inside the state’s right-of-way along SR 400. These early tasks, while less dramatic than heavy construction, are critical groundwork for what lies ahead. Initial operations will concentrate on Zone 10, near Encore Parkway and Haynes Bridge Road, areas where residents can expect to see activity ramp up.
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Officials have indicated that nearby neighborhoods will receive advance notification before work starts. Efforts are being structured to reduce traffic interruptions as much as possible, though drivers should anticipate construction signage and remain attentive while traveling through active zones. Even routine preparatory work can alter traffic patterns, and state officials are urging motorists to use caution.
The express lanes project has long been framed as a strategic investment in mobility, designed to provide additional travel options along a corridor that regularly experiences heavy congestion. While the current phase centers on clearing and site preparation, it represents tangible progress toward the broader buildout envisioned for SR 400.
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Residents seeking more detailed information are encouraged to monitor updates directly from the Georgia Department of Transportation. Project-specific questions can be directed via email to [email protected], and community members may also subscribe to receive ongoing notifications as milestones unfold. The City of Alpharetta has stated it will continue sharing updates as they become available, thanking residents for their patience as the state-led initiative advances.
Read the Full Project Update from GDOT  SR 400 PROJECT ACTIVITIES NOTICE – ALPHARETTA (PDF)
