The MBTA will shut down train service on parts of the Red Line on July 16 to allow for planned signal and infrastructure work.
Shuttle buses will replace train service in both directions between the JFK/UMass and Mattapan Stations, from the morning until approximately 6 p.m., when regular rain and trolley service will resume, the MBTA said.
“We know any diversion in regular train service can be a frustration, and we thank our Ashmont and Mattapan Line riders for their patience as we accomplish this important work,” MBTA General Manager Steve Poftak said. “When this work is complete, it will ultimately translate into a better, more reliable commute for our Ashmont and Mattapan riders.”
Work will take place on both the Red Line Ashmont branch and the Mattapan Line, with the latter as part of the T’s Mattapan Line Transformation Program.
Included in the MBTA’s five-year Capital Investment Plan, the transformation has been budgeted at $114.5 million, with another projected $12.2 million cost for refurbishing the 75-plus-year-old Mattapan Presidents’ Conference Committee trolley cars, according to a T presentation.
The project aims to make improvements throughout the Mattapan Line, “to ensure accessible, reliable and modern service for Dorchester, Mattapan, and Milton for years to come,” the T said.
The line serves about 6,600 riders per day, and its trolley fleet runs on 2.6 miles of track between Ashmont, on the Red Line, and Mattapan station.
During the July 16 service shutdown, work crews will replace the existing signal house at the Ashmont station, and the transformation program team will carry out a “full 360-degree LiDAR scan and Ground Penetrating Radar of the corridor,” the T said.
“To be used in the development of the full design of the Mattapan program, the information gathered may also reduce the need for future outages and minimize riders’ impacts,” the MBTA said.
The T said the Mattapan transformation will take place over the next eight to 10 years, with improvements to the historic trolley fleet and infrastructure.
The agency said it is also considering “substantial changes” beyond the next decade, which could include a new fleet and the infrastructure needed to support it.
“The purpose of the Mattapan Line Transformation Program is to implement a state of good repair and accessibility improvements to all stations and facilities, replacement/modernization of the power infrastructure, strengthening of corridor bridges, improvements to corridor drainage, new at-grade crossings, and other infrastructure improvements to meet the needs for today and future deployment of the Type 9 vehicles,” reads a past MBTA meeting presentation.