The operator of the state's commuter rail system would receive more than $15 million in additional payments over the next 12 months under contract revisions aimed at improving the system's service and reliability.
Massachusetts Bay Transportation Authority officials said Monday they are also increasing the maximum financial penalties that Keolis Commuter Services could be charged for missing daily performance goals.
The company was awarded an eight-year, nearly $2.7 billion contract by the MBTA in 2014 to run the 394-mile commuter rail system. The company is a subsidiary of French group Keolis International.
Keolis has reported losing more than $40 million over the first 18 months of the contract.
State Transportation Secretary Stephanie Pollack says the additional payments are being made to benefit passengers, not to help Keolis financially.