In an effort to determine the best opportunities for transit investments in the Baltimore-Washington Corridor, there were several studies conducted from 2004 to 2008 in the Corridor, that together were dubbed the Baltimore-Washington Investment Corridor (BWIC).
In 2004, the Maryland Transit Administration (MTA) initiated a feasibility study for extending the Washington Metropolitan Area Transit Authority (WMATA) Green Line from the Greenbelt Metro Station to Laurel (Laurel Racetrack). This feasibility study grew to include service to a number of destinations such as Muirkirk, Fort Meade, and the BWI Thurgood Marshall Airport to accommodate travel needs associated with the Base Realignment and Closure (BRAC) initiative. Ensuing discussions regarding these studies did not result in a consensus among regional leaders to extend the Green Line.
More recently, planning efforts have focused on more short-term transit improvements, as well as land-use strategies, to support growing demand in this corridor.