Fairfax, Virginia
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$3.7B
Total Investment
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22.5mi
Length
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2016-2066
Concession period
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2022
Opening date
Project Details
66 OTB is a major public-private partnership (P3) that transformed 22.5 miles of I-66 in Northern Virginia into a multimodal corridor to improve mobility, safety, and travel options.
The project spans from I-495/Capital Beltway to Route 29 in Gainesville, executed under a 50-year DBFOM agreement between VDOT and I-66 Express Mobility Partners (Cintra, Meridiam, APG).
With a $3.7 billion investment, including a $579 million concession fee, it funded 16 additional infrastructure projects at no cost to taxpayers.
Completed ahead of schedule in Fall 2022, it delivers long-term economic, operational, and social benefits, focusing on moving more people—not just more cars.
Key Features
- 2 new express lanes + 3 rebuilt general-purpose lanes in each direction.
- Reserved space for future transit, improved interchanges, and safety upgrades.
- 4,000+ new park-and-ride spaces, 2 new facilities with direct express lane access.
- $340 million (NPV) in financial support for mass transit over the contract term.
- Enhanced bus service, TDM strategies, and 18+ miles of bike/pedestrian paths, including the 11-mile 66 Parallel Trail.
Community Benefits
I-66 Express Mobility Partners (EMP) has built strong partnerships with nonprofits and school foundations in Fairfax and Prince William Counties.
Over $600,000 contributed to causes supporting: STEM education (camps, labs, maker spaces, teracher grants), food security (weekend food packs), child welfare (clothing kits) and public safety, environmental stewardship and veteran support
66 OTB corridor has improved travel efficiency and capacity: 20% increase in people throughput, 11% increase in highway volume, peak speeds: 68 mph (express lanes), 50 mph (general-purpose lanes)
Travel time reduced by 57%:
- Express lanes: 19 minutes.
- General-purpose lanes: 26 minutes
- Pre-construction: 44 minutes
The I-66 Outside the Beltway project is a national example of a multimodal solution providing not only a world-class, traffic congestion-reducing roadway but also pedestrian and biking trails and park-and-ride facilities for enhanced Metro access. All made possible by marketplace competition and collaboration between the public and private sectors.
Former U.S. Secretary of Transportation, Mary Peters
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