The Massachusetts Bay Transportation Authority (MBTA) is a public transportation system serving the Greater Boston area. The MBTA operates subway, bus, commuter rail, and ferry services throughout the region. The system is one of the oldest and largest public transit systems in the United States, with a history dating back to the late 19th century. The MBTA is responsible for providing safe, reliable, and affordable transportation to millions of riders each year. The system has faced numerous challenges in recent years, including aging infrastructure, budget deficits, and declining ridership.