Greenbelt is a Washington Metro and MARC station in Prince George's County, Maryland on the Green Line. It is the northeastern end of the Green Line.The station is located in Greenbelt (near Berwyn Heights, Beltsville, and the northern part of College Park), off of Cherrywood Lane near the Capital Beltway. It has a parking lot of over 3,300 spaces, and with quick access to the outerloop of the Beltway (Interstate 95 North) and from the inner loop of the Beltway (Interstate 95 South). It is a commuter station for both locals and people coming from elsewhere—such as the inner loop of the Beltway or from Baltimore. An express Metrobus service, the B30 route, is also available to Baltimore–Washington International Airport (BWI), allowing a connection to Baltimore transit services. Greenbelt Metro is also the most accessible station to NASA workers and visitors via TheBus routes 15 and 15X, as well as Metrobus route G14.Service at Greenbelt began on December 11, 1993. The opening of Greenbelt station coincided with the opening of three other stations in northern Prince George's County, Md, and the completion of 7.96 miles of rail north of Fort Totten. There are tentative plans to extend the Green Line from Greenbelt northward toward Laurel, Fort Meade, and possibly BWI Airport.