This is from The New England Council:

“Keolis North America, a New England Council member, has announced that beginning this month it will resume the $10 Commuter Rail weekend fare pilot program in partnership with the Massachusetts Bay Transportation Authority. Keolis is contracted to operate the MBTA’s Commuter Rail system, which provides rail service throughout Greater Boston and into Rhode Island.

This program was first piloted during the summer of 2018, with the goal of increasing Commuter Rail ridership and revenue on the weekends. This initiative resulted in more than 180,000 tickets being sold, and very positive feedback from passengers. Like before, this special fare will cover the first train on Saturday to the last train on Sunday, and will apply across all zones and lines.

David Scorey, general manager and CEO of Keolis, said, “The MBTA’s reduced weekend fare initiative gives passengers a convenient and affordable option to visit a number of great destinations across the greater Boston area. We’re pleased to partner with the MBTA to continue this initiative that encourages new passengers to try Commuter Rail, helps to grow ridership, and promotes an environmentally friendly transit option.”