MBTA Commuter Rail is the commuter rail system for the Greater Boston metropolitan area of Massachusetts. It is owned by the Massachusetts Bay Transportation Authority (MBTA) and operated under contract by Keolis. In 2019, it was the sixth-busiest commuter rail system in the United States with an average weekday ridership of 121,700. The system's routes span about 400 miles (640 km) and cover roughly the eastern third of Massachusetts and the northern half of Rhode Island. They stretch from Newburyport in the north to North Kingstown, Rhode Island, in the south, and reach as far west as Worcester and Fitchburg. The system is split into two parts, with lines north of Boston having a terminus at North Station and lines south of Boston having a terminus at South Station.