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Transport 22 APR 2026
  • Once complete, the project will improve travel time reliability, increase road capacity, and give drivers the option to bypass congestion through managed lanes

Construction is officially underway on the SR 400 Express Lanes project, a major transportation initiative delivered by SR 400 Peach Partners, a consortium of ACCIONA, ACS Group and Meridiam, which covers the design, construction, financing and 55-year operation of a major new express lanes corridor in Atlanta.

A formal ceremony took place in Alpharetta, bringing together the Georgia Department of Transportation (Georgia DOT), the State Road and Tollway Authority (SRTA), the U.S. Department of Transportation (USDOT), along with elected officials and project partners. The event, produced by True North 400, marked the groundbreaking of the SR 400 Express Lanes project.

With an investment of approximately $10.8 billion (€9.8 billion), the project will add new, optional dynamically priced express lanes in both directions, encompassing a 16-mile stretch between the North Springs MARTA Station and north of McFarland Parkway.

Once complete, the project will improve travel time reliability, increase road capacity, and give drivers the option to bypass congestion through managed lanes. In addition to improving reliability for drivers, the project advances transit in metro Atlanta through dedicated, toll-free access for MARTA’s future bus rapid transit (BRT) service. The express lanes system will also support regional network connectivity by integrating with existing and planned managed lane infrastructure throughout metro Atlanta.

Early construction activities will include site mobilization, survey and geotechnical work, utility coordination, clearing and grading operations, maintenance of traffic installations, and foundational work for structures and retaining systems.

KEY PROJECTS

ACCIONA continues to expand its presence in the United States, delivering major infrastructure projects nationwide.

Aside from the SR 400 project, the company is leading the design and construction of the Calcasieu River Bridge in Louisiana, a critical infrastructure upgrade that will enhance connectivity and safety along Interstate 10.

In North Dakota, as part of the Red River Valley Alliance, ACCIONA is delivering the Fargo-Moorhead River Flood Diversion Channel project, a P3 flood protection initiative working alongside the U.S. Army Corps of Engineers to protect more than 235,000 residents from severe flooding.

In the water sector, the company recently completed the renovation of the Tampa Bay (Florida) desalination plant and will design, build and operate and maintain the Doheny Ocean Desalination Plant in California, strengthening long-term water supply resilience. It also has three major water treatment projects in Puerto Rico, which will benefit a combined 325,000 residents.

In renewable energy, ACCIONA Energía operates a total installed capacity of 3GW in the USA, including 1.4GW of wind, 1.3 of solar, a 64 MW solar thermal plant and one of the largest utility-scale battery energy storage systems in Texas.

In addition, ACCIONA Cultura has been selected to carry out projects at two iconic cultural institutions in New York City: The National Museum of Immigration on Ellis Island and The Hip Hop Museum in the Bronx. It has also carried out projects at the National Underground Railroad Freedom Center in Ohio, and the San Diego Museum of Art in California.