Skanska

The design-build project scope includes replacing the existing 1930-era bascule bridges with new vertical lift spans, upgrading approach trestles, constructing a new Tower A control facility and supporting the addition of a new Platform F at North Station. The work also encompasses integrated track, signal and Positive Train Control (PTC) upgrades, enhance resiliency and maintain uninterrupted commuter rail and Amtrak service throughout construction.

Additional elements include the use of Alternative Technical Concepts to reduce in-water work, simplify staging, improve safety and expand across the Charles River from four to six tracks while minimizing service disruptions for the more than 100,000 daily riders who rely on the MBTA's north-side network.

Work is scheduled to commence in May 2026, with expected completion in Fall 2032.