The MBTA will be suspending commuter rail service during select weekends on several commuter rail lines starting this summer. Replacement shuttle service will be provided during any suspension in commuter rail service. The weekend service disruptions are needed so that the MBTA can install Positive Train Control safety systems on each line.
Here is a list of the commuter rail lines impacted:
The 2018 Positive Train Control weekend shutdowns will be finalized by late 2017/early 2018 in order to start back up in Spring of 2018, and will impact the Franklin, Fitchburg, and Worcester Commuter Rail lines.
No weekend shutdowns are required on the Greenbush, Middleborough, Providence/Stoughton, and Kingston/Plymouth Commuter Rail lines.
More information on the project is available here: http://mbta.com/about_the_mbta/t_projects/default.asp?id=6442457882