The Massachusetts Bay Transportation Authority is the public agency responsible for operating most public transportation services in Greater Boston, Massachusetts. The MBTA transit network includes the MBTA subway with three metro lines , two light rail lines , and a five-line bus rapid transit system ; MBTA bus local and express service; the twelve-line MBTA Commuter Rail system, and several ferry routes. In 2022, the system had a ridership of 216,329,500, or about 757,000 per weekday as of the second quarter of 2023, of which the rapid transit lines averaged 274,700 and the light rail lines 100,000, making it the fourth-busiest rapid transit system and the third-busiest light rail system in the United States. As of the second quarter of 2023, average weekday ridership of the commuter rail system was 90,500, making it the fifth-busiest commuter rail system in the U.S.