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South-Side Maintenance and Layover Facility

Commuter Rail train 1068 is shown in the center of a busy scene from the Boston Engine Terminal maintenance facility. It is up on high tracks that allow workers to work on the train from below. Yellow metal stairs and railings on either side of the train allow workers to enter the train from above. Many silver ducts and lights right overhead, and more lighting from below the train illuminates it from underneath.
A Commuter Rail train undergoes maintenance at the Boston Engine Terminal (BET) maintenance facility in Somerville (May 2022)

We are building a new maintenance and layover facility to address the needs of Commuter Rail operations on the south side of the system, which begins and ends at Boston's South Station. The South-Side Maintenance and Layover Facility (SSMF) project will construct a new facility at the existing Readville Layover Facility in Boston’s Hyde Park neighborhood.

Design contract awarded: May 2021
Budget: $5 million (for initial design and environmental work)
Status: 15% design, environmental review ongoing

Building a Better T

As part of our $9.6 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’re Doing This Work

We have only one facility for major repairs and replacement of Commuter Rail equipment—the Boston Engine Terminal (BET) in Somerville. All locomotives and coaches serving the Commuter Rail network's south side currently travel six miles round trip between South Station and BET for maintenance. By building this facility, we can accomplish the following:

  • Reduce maintenance and capital costs
  • Create operational efficiency and redundancy
  • Reduce vulnerability to climate change
  • Eliminate extensive and costly detours

Downloads

The Expanded Environmental Notification Form (EENF) that was submitted to the Massachusetts Environmental Policy Act (MEPA) unit is available for review. The Executive Summary outlines the EENF and includes a link to the project submission page.

The comment period for the EENF is closed. The MBTA provided a supplemental memo on the South-Side Maintenance Facility purpose and use to MEPA during the extended review period, which closed on January 23, 2023.

On January 30, 2023, the Secretary of Environmental Affairs issued a certificate on the EENF. The certificate requires preparation of a Draft Environmental Impact Report.

To view the certificate, complete the following steps:

  1. Open the MEPA Environmental Monitor site
  2. In the search fields, select year: 2022 and publication date: November 9, 2022
  3. Find MBTA South-Side Maintenance and Layover Facility (EEA No. 16622)

Contact Us

For all questions and comments related to the South-Side Maintenance Facility, please contact the project team at SSMF@MBTA.com.

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Building a Better T

As part of our $9.6 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