en.Wedoany.com Reported - The Massachusetts Bay Transportation Authority (MBTA) has completed testing and commissioning of the digital signal system on its Red Line Ashmont Branch, marking progress in modernizing the line's signal system.

This development is a new component in the modernization of a major transit corridor within the MBTA network and is part of a broader train control infrastructure renewal plan aimed at enhancing daily operational reliability.

The new digital signal system is designed to replace aging signal technology with modern train control equipment. The MBTA stated that the completed work is part of an infrastructure improvement project for the Red Line Ashmont Branch and the Mattapan Line. The MBTA expects this upgrade to support more reliable operations and improve long-term performance on the Red Line. MBTA Interim Transportation Secretary and General Manager Phillip Eng noted that the completed phase represents significant progress in the line's modernization, and this work should improve reliability for passengers. He thanked MBTA staff for completing the signal, track, and power upgrades and expressed gratitude to passengers for their patience during construction.

The signal work has progressed in parallel with other infrastructure improvements aimed at enhancing network resilience. Between Savin Hill and Fields Corner, MBTA teams conducted track and tamping work, which allowed the authority to lift speed restrictions that had been in place since August 2025.

Power infrastructure upgrades have also been completed at the Codman Yard facility, which supplies power to the Mattapan Line. Related public procurement records on COMMBUYS show the official framework for broader power and infrastructure work associated with Codman Yard and the Mattapan corridor. This broader package of work also includes bridge and retaining wall inspections, accessibility improvements, and preparatory work related to future planned upgrades for the Mattapan Line.

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