The Yellow Line is rapid transit line of the Washington Metro system that runs between Huntington in Virginia and Mount Vernon Square in Washington, D.C. It consists of 13 stations in Fairfax County, the city of Alexandria, and Arlington County in Virginia and Washington, D.C. It is the shortest line in the system, and since its truncation to Mount Vernon Square, it is the only line that does not enter Maryland. The Yellow Line shares track with the Blue Line between King Street-Old Town and Pentagon and the Green Line between L’Enfant Plaza and Mount Vernon Square. It has only two stations that are not shared by other lines ( Huntington and Eisenhower Avenue) and only two sections of track that are not shared by any other lines – the section south of King Street–Old Town and the section between Pentagon and L’Enfant Plaza, crossing the Potomac River. The southern terminus of the Yellow Line is adjacent to Kings Highway (Virginia State Route 241) in Fairfax County, Virginia. The line heads northeast on a bridge over Hunting Creek and the Capital Beltway to a station just south of Eisenhower Avenue, which serves several government office buildings, including the United States Patent and Trademark Office. The Yellow Line then merges with the Blue Line and follows the right-of-way of the RF&P Railroad through the City of Alexandria. Rolling Stock: Alstom 6000 Series
