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Due to a structural issue with the Gov't Ctr Garage, Green Line is replaced by shuttle buses between Gov't Ctr and Union Sq. Orange Line is suspended between North Station and Back Bay. Orange Line customers can use Green Line service through Downtown.   MBTA.com/DowntownDiversion

Lechmere Viaduct Ready for Service

Updated on March 17, 2022

an empty green line test train on the lechmere viaduct, with a pretty purple sky as a backdrop
A test train crosses the restored Lechmere Viaduct (March 2022)

On March 16, 2022, the Lechmere Viaduct Rehabilitation project reached substantial completion. The 110-year-old structure is now restored, with new track, signals, and power systems across the viaduct.

Learn more about the Lechmere Viaduct Rehabilitation project

Building a Better T

As part of our $8 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.

Learn more

Why We Did This Work

These improvements will enable the existing Green Line system to connect with the Green Line Extension (GLX) when the Union Square branch opens for service on March 21, 2022. It also supports the delivery of future Green Line vehicles, bringing more modern and accessible service to all Green Line riders.

What We Accomplished

a graphic representation of the work done during the lechmere viaduct project, with photos of the work to accompany the graphic: 6,432 linear feet of steel springers repaired, 305 cubic yards of concrete poured, 3,866 track feet of track rehabilitation, and 1,222 linear feet of carbon fiber wrapping

Crews completed the following work during construction:

  • Reinforced all 12 spans with carbon fiber wrap to increase structural integrity
  • Renewed more than 3,500 feet of track and 70,000 feet of signals
  • Replaced the overhead catenary system that supplies power to the trains
  • Enhanced accessibility for riders at Science Park station

The completed project will extend service life, reduce maintenance costs, and allow the viaduct to handle heavier loads—while also preserving the aesthetics of the historical structure.

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Building a Better T

As part of our $8 billion, 5-year capital investment plan, we're renovating stations, modernizing fare collection systems, upgrading services for our buses, subways, and ferries, and improving the accessibility of the entire system.

Learn more

Related Projects

View all projects

Related Projects

View all projects