Ashmont:

This project will replace existing traction power equipment and add additional traction power equipment in order to meet the increased power requirements of the expanded Codman Yard and the upgrade of the Mattapan High Speed Line. The project will also renovate the building structure of the Ashmont Traction Power Substation in order to return the facility to a state of good repair.

Mattapan:

The Mattapan VMF and TPSS Projects are a part of the overall Mattapan Line Transformation Program, which aims to modernize the Mattapan Line as well increase accessibility and improve the reliability of the service. The program’s primary objective is to implement the necessary infrastructure upgrades to accommodate Type 9 light rail vehicles, allowing for the retirement of the existing PCC trolleys. The projects overall scope is below:

Vehicle Maintenance Facility - Construct new Vehicle Maintenance Facility in the Mattapan Yard to maintain and store the future vehicle fleet.

Power - Implementation of a new Traction Power Substation to accommodate the added power draw of Type 9s in comparison to the existing PCC trolleys.