Monthly pass holders have filed a lawsuit against the MBTA and Keolis over "substandard commuter rail service" this winter.

The suit was filed on Wednesday but announced on Friday, which the MBTA had designated as "Customer Appreciation Day," offering free rides and deals at local businesses as a goodwill gesture following a winter of disastrous breakdowns.

"The MBTA Law Department has not seen the complaint," said MBTA spokesperson Joe Pesaturo in a statement. "It was provided only to the media."

Named as the plaintiff are Raquel Rodriguez and John Doe A-Z, "on behalf of themselves and all others similarly situated."

Click here to read the lawsuit.

Stay with necn as this story develops.