The HRBT Expansion is the biggest highway construction project Virginia has ever undertaken, and after the tunnel-boring machine “Mary” finished her run this March, it’s also the U.S. East Coast’s most-watched mega-tunnel. The $3.9 billion job widens nearly 10 miles of Interstate 64 between Norfolk and Hampton, anchored by twin two-lane bored tunnels under the harbor that double the existing four-lane crossing.

Hampton Roads Connector Partners (a joint venture of Dragados USA, Flatiron, Vinci Construction, and Dodin Campenon Bernard) holds the design-build contract. HDR and Mott MacDonald lead the design joint venture. STV provides ongoing quality-assurance oversight on the bored tunnel.

Project Scope

The headline scope is the harbor crossing: two new bored tunnels, each carrying two lanes, running parallel to the existing immersed-tube tunnels. Mary, a 46-foot-diameter Herrenknecht tunnel-boring machine, completed her excavation push in March 2026 and is being disassembled and removed from the site. Tunnel outfitting (ventilation, jet fans, lighting, drainage, fire and life safety, traffic systems) is now the long-lead activity on the schedule.

Beyond the tunnels, the project widens roughly 10 miles of I-64 from four lanes to six (with managed shoulders that flex to a seventh lane during peak), reconstructs two interchanges, and replaces several waterway approach bridges. Hampton Roads Connector Partners is delivering all of it under one design-build prime contract, the largest single award in VDOT’s history.

The site sits on the southern terminus of one of the busiest military and commercial logistics corridors on the U.S. East Coast. Naval Station Norfolk and the Port of Virginia both depend on the existing crossing, which has been a chokepoint for decades.

Why It Matters

The HRBT Expansion is the U.S. project that the next generation of immersed-tube and bored-tunnel megaprojects will be measured against. VDOT’s procurement model (a single design-build prime, public funding, an aggressive but credible incentive structure) has become the template that other state DOTs are studying for their own harbor crossings.

The current substantial completion date was reset to February 2027 after VDOT pushed it back 18 months from the original target. A $90 million incentive for HRCP to deliver early by September 2026 is now the active number on the schedule. The reset is unusual for being on the record (most DOT mega-projects soak up their schedule slips into the baseline without public revision) and it sets a precedent for how transparent procurement on tunnel projects gets handled in the next decade.

For the Hampton Roads region, the actual capacity story matters more than the procurement one. The existing HRBT carries roughly 100,000 vehicles per day, and military shutdowns of the corridor cascade into supply-chain and commute disruptions across Norfolk, Newport News, and Virginia Beach. The expansion approximately doubles peak-direction capacity. Daily users get the benefit in late 2026 if HRCP hits the incentive.

Project Team & Details