Massachusetts is committing $31 million to improve rail service in and around Pittsfield, as the state moves to support seasonal Berkshire Flyer trains between the Berkshires and New York City and explore broader passenger service, including a connection from Boston to the Pittsfield area. The state Transportation Department also reached an agreement with freight railroad CSX to support the seasonal service and reduce conflicts between freight and passenger trains, Gov. Maura Healey said. New federal funding awarded to Amtrak will help pay for modern trains on Compass Rail lines. Healey described the investment as a step toward making seasonal Berkshire Flyer service permanent and expanding passenger options in western Massachusetts. The announcement comes during peak fall foliage, a busy period for Berkshire tourism. Lindsay Schmid of regional tourism organization 1Berkshire said expanded rail service could bring economic benefits to the region. “It opens doors, gives potential expanded service, which is what we’ve been advocating for years,” she said. The announcement did not specify a start date or schedule for additional service. The agreement and funding address a longstanding operational challenge: passenger trains must share rail infrastructure with freight traffic. Better coordination could make seasonal trips more workable while laying groundwork for more frequent connections to the Berkshires.