NASHVILLE, Tenn. — In what state officials are heralding as a monumental leap forward for regional infrastructure, the Tennessee Transportation Modernization Board has officially greenlit a massive, $9.2 billion public-private partnership (P3) to construct the I-24 Southeast Choice Lanes project. Announced by Tennessee Governor Bill Lee, the endeavor stands as the largest P3 concession for an interstate choice lanes project in United States history.
The ambitious project will be executed by an elite, multi-national consortium of construction and infrastructure stalwarts, featuring engineering giant AECOM alongside global infrastructure and mobility leaders Ferrovial, Cintra, Webber, Transurban, and Tikehau Star Infra.
As urban centers across the American South grapple with unprecedented population booms and subsequent traffic congestion, Tennessee’s landmark initiative offers a potential blueprint for how state departments of transportation can leverage private sector capital, innovation, and operational expertise to tackle multi-billion-dollar transit crises.
Main Facts
The core of the award centers on the delivery of the Interstate 24 Southeast Choice Lanes project, a complex engineering and construction undertaking valued at $9.2 billion.
- The Location: Spanning approximately 26 critical miles of I-24 between downtown Nashville and the Interstate 840 interchange, the corridor is one of the busiest and most vital commuter arteries in the "Volunteer State."
- The Scope: The private-sector consortium will design, build, finance, operate, and maintain new, optional choice lanes in each direction alongside the existing highway. Crucially, general-purpose lanes will remain entirely free to all motorists, preserving non-toll options for everyday commuters.
- The Consortium: The winning team is a powerhouse of international and domestic engineering talent. It includes AECOM, Ferrovial and its U.S.-based subsidiaries Cintra and Webber, global toll-road operator Transurban, and infrastructure management firm Tikehau Star Infra (a subsidiary of Tikehau Capital).
- The Mechanism: Unlike traditional toll roads where drivers must pay to traverse an entire highway, choice lanes allow motorists to selectively opt-in for a fee only when they choose to bypass heavy congestion in the main lanes.
Project Chronology and Evolution
The path to awarding America’s largest interstate choice lanes P3 project has been years in the making, rooted in strategic legislative changes and rigorous state-level evaluations.
The Legislative Catalyst (2023)
For decades, the Tennessee Department of Transportation (TDOT) faced the same fiscal constraints as state agencies nationwide: traditional tax revenues and federal funding formulas were falling woefully short of matching skyrocketing infrastructure demands. Recognizing the need for a paradigm shift, the Tennessee General Assembly passed the landmark Transportation Modernization Act in 2023.
This pivotal legislation modernized state law to expand TDOT’s toolkit, granting the department unprecedented authority to utilize alternative delivery methods—most notably, public-private partnerships. Without the passage of the Transportation Modernization Act, a project of the scale and financial complexity of the I-24 Southeast Choice Lanes would have remained fiscally out of reach.
Procurement and Selection
Following the passage of the 2023 act, TDOT initiated a competitive procurement process to identify private sector teams capable of financing, delivering, and managing a mega-project of this magnitude. State evaluators scrutinized global consortiums on their financial strength, engineering prowess, environmental mitigations, and operational track records.
Board Approval (August 2026)
In August 2026, Governor Bill Lee and the Tennessee Transportation Modernization Board formally announced the selection of the AECOM-Ferrovial-led consortium. This milestone cleared the final major hurdle for the procurement phase, transitioning the initiative from a heavily negotiated proposal into an officially approved public-private partnership.
Supporting Data and Technical Scope
To fully understand the magnitude of the I-24 Southeast Choice Lanes project, one must examine the operational data and geographic significance of the corridor.
- Project Valuation: $9.2 billion.
- Corridor Length: Approximately 26 miles of interstate roadway.
- Geographic Reach: Connecting the booming urban core of Nashville with I-840, servicing one of the fastest-growing residential and commercial corridors in the southeastern United States.
- Broader Context of I-24: Interstate 24 is a critical national and regional freight and commuter thoroughfare. Originating in Marion, Illinois, it cuts directly through Nashville before terminating in Chattanooga, Tennessee, serving as a vital link in the nation’s supply chain and economy.
- Choice Lane Dynamics: Choice lanes (often referred to regionally as Express Lanes or High-Occupancy Toll lanes) utilize dynamic pricing models. Toll rates fluctuate in real-time based on traffic volume to ensure free-flowing speeds within the designated lanes, offering a reliable, time-saving alternative for transit buses, carpools, and individual motorists willing to pay a premium during peak travel hours.
Official Responses and Stakeholder Perspectives
The announcement drew widespread praise from state leaders, transportation officials, and representatives of the winning consortium, who emphasized both the immediate relief the project will bring and the long-term vision it represents.
Governor Bill Lee pointed to the historic nature of the P3 agreement as proof that Tennessee is pioneering innovative solutions to modern growth challenges.
"We have moved from facing a critical transportation need without a viable path forward to an opportunity that will deliver the project, enhance communities, and improve travel," said TDOT Commissioner Will Reid during the official announcement.
Reid outlined the immediate next steps for the state transportation agency, emphasizing accountability and rigorous due diligence:
"Our responsibility now is to verify the commitments, complete the required reviews, finalize the agreement, and deliver as promised."
Industry leaders within the consortium echoed these sentiments, expressing enthusiasm for partnering with the state of Tennessee on a project that will set a new benchmark for American infrastructure delivery. Executives from AECOM, Ferrovial, Cintra, Webber, Transurban, and Tikehau Capital noted that the project showcases the power of combining public oversight with private sector innovation to accelerate project delivery and mitigate taxpayer risk.
Broader Implications for Infrastructure and P3s
The approval of the $9.2 billion I-24 Southeast Choice Lanes project carries profound implications well beyond the borders of Tennessee, signaling shifting trends in American transportation policy.
1. A New Benchmark for Alternative Delivery
For decades, mega-projects of this scale were funded almost exclusively through federal grants and state gasoline taxes—revenue streams that have steadily eroded due to inflation and the rising popularity of electric and fuel-efficient vehicles. By successfully executing the largest P3 concession for an interstate choice lanes project in U.S. history, Tennessee is demonstrating that private capital can successfully absorb significant financial risk while delivering critical infrastructure at an accelerated pace. Other fast-growing states struggling with gridlock are expected to closely monitor Tennessee’s model.
2. Mitigating Nashville’s Congestion Crisis
As Nashville continues to rank among the top destination cities for corporate relocations and new residents, traffic congestion along the I-24 corridor has transformed from a daily nuisance into a genuine economic bottleneck. By introducing choice lanes, the project aims to stabilize travel times for freight carriers, public transit, and everyday workers, directly supporting regional economic competitiveness.
3. Balancing Access and Equity
Choice lanes projects often spark public debate regarding equity—specifically, whether toll-managed lanes create a "Lexus lane" dynamic that favors affluent drivers over working-class commuters. Tennessee’s project design attempts to address this concern by guaranteeing that general-purpose lanes remain completely free and untouched by tolls, while choice lanes remain optional. Furthermore, the inclusion of dynamic tolling ensures that transit buses and carpools can utilize the corridors efficiently, potentially boosting regional mass transit ridership.
4. Regulatory and Financial Next Steps
While the Transportation Modernization Board has approved TDOT’s selection of the consortium, significant work remains before ground can be broken. TDOT and the private partners must complete comprehensive environmental reviews, finalize complex financial closing documents, and establish ironclad performance metrics. If these final phases proceed smoothly, the I-24 Southeast Choice Lanes project will cement itself as a defining achievement in 21st-century American civil engineering and public-private collaboration.
