MBTA weekday commuter rail service will operate at 100 percent for the first time in over a month on Monday, Keolis said.

Arguably the hardest hit of the T’s modes this winter, the commuter rail has run limited service since the middle of February, with record-setting amounts of snow wreaking havoc on railroad infrastructure and an aging fleet of trains.

On Thursday, Keolis commuter services general manager Gerald Francis said in a statement:

On behalf of the entire Keolis team, I want to thank our passengers and this community for bearing with us as we have worked day and night over the past month to restore the commuter rail service. We know the service interruptions have caused hardships for our passengers and we want this community to know that we are doing everything in our power to regain their trust by providing a service that is safe and reliable, and to communicate better when issues arise that impact schedules.

A three-week stretch of winter storm after winter storm disabled more than a third of the commuter rail’s regular weekday fleet of locomotives. During that span, Keolis said, 67 traction motors failed. For context, Keolis added that only about 20 traction motor failures would be expected during a “normal” winter.