The MBTA and Keolis, which operates the commuter rail system, recently released their fall/winter schedule this month with a notice that a much-requested additional late-night commuter rail service will be added for most lines running through Dorchester and Mattapan beginning on Mon., Oct. 2.

The new schedule will include later trains for the Fairmount Line that runs through Dorchester and Mattapan, as well as for the commuter trains that go through JFK Station – which include the Kingston, Greenbush, and Middleborough lines.

Specifically, the Fairmount line’s last weekday train will leave South Station at 11:55 p.m., 55 minutes later than the current time. The line’s last train on weekends has been leaving at 11:20 p.m. and that will continue.

There are six Fairmount Line stations in Dorchester and Mattapan, including Newmarket, Uphams Corner, Four Corners/Geneva, Talbot Avenue, Morton Street, and Blue Hill Avenue.

For the Kingston and Middleborough trains that stop at JFK Station from South Station, the final trains will leave at 11:55 p.m. on weekdays, and 11:30 p.m. on weekends. Weekday services now have a last train at 11 p.m. and before 11 p.m. on weekends.

Under the new schedule, The Greenbush Line will have a last train at 11:35 p.m. on weekdays, and 11:20 p.m. on weekends.

“We understand how the availability of mass transportation options affects how our riders choose to travel. This fall schedule balances the needs of our customers that rely on Commuter Rail for work, but also now better serves the public with additional late-night trains,” said MBTA General Manager and CEO Phillip Eng.