The Daily Dig
Georgia DOT is moving ahead with the SR400 Express Lanes, a $4.6 billion corridor stretching 16 miles north of Atlanta. Major construction starts in April, adding tolled express lanes from the North Springs MARTA station to just north of McFarland Parkway across Fulton and Forsyth counties.
SR400 Peach Partners, a consortium of Acciona Concessions, ACS Infrastructure, and Meridiam, is delivering the project under a 56-year public-private partnership covering design, construction, financing, operations, and long-term maintenance. FlatironDragados and Acciona Construction are leading the design-build effort as a joint venture. Clearing, equipment mobilization, and work zone setup are already underway.
Project Snapshot:
Project / Corridor: SR400 Express Lanes
Location: Fulton & Forsyth Counties, GA
Length: 16 miles
Delivery Model: 56-year public-private partnership
Concessionaire: SR400 Peach Partners (Acciona Concessions, ACS Infrastructure, Meridiam)
Design-Builder: FlatironDragados + Acciona Construction JV
Value: $4.6 billion
Scope: Tolled express lanes, bridge work, interchange upgrades
Current Status: Clearing, mobilization, and work zones underway; major construction begins April 2026
Express Lanes Opening Target: 2031
TheJobWalk Thoughts
A 56-year P3 on a live DOT corridor runs differently than a standard public bid. Once execution kicks in, the design-build JV controls the procurement schedule, and bridge, interchange, and MOT packages tend to move fast and stack up quickly.
Subs and suppliers already in the orbit of FlatironDragados or Acciona Construction have a real advantage. Early relationship capital matters on a job like this, especially when schedules compress and the JV needs crews they can count on.
For anyone not yet connected, the time to get in front of the right people is before segment work ramps and the bid calendar fills. Phased packages tied to segment sequencing are typically where the first trade opportunities surface on a corridor this size.

Source: Georgia DOT

Source: Georgia DOT

Source: Georgia DOT



