The Orange Line is one of the six rapid transit lines of the Washington Metro system, consisting of 26 stations in Fairfax County and Arlington in Northern Virginia; Washington, D.C.; and Prince George’s County, Maryland, United States. Half of the line’s stations are shared with the Blue Line and over two-thirds are shared with the Silver Line. Orange Line began service on November 20, 1978. Termini: Vienna and New Carrollton Stations: 26 Type: Rapid Transit System: Washington Metro Operator: Washington Metropolitan Area Transit Authority Line length: 26.4 mi(42.5 km) Number of tracks: 2 Character: At-grade, elevated, and underground Track gauge: 4 ft 8 + 1/4 in ( 1, 429 mm) Electrification: Third rail, 750 V DC Stations: 1. Vienna/Fairfax-GMU 2. Dunn Loring-Merrifield 3. West Falls Church 4. East Falls Church 5. Ballston-MU 6. Virginia Square-GMU 7. Clarendon 8. Court House 22. Minnesota Avenue 23. Deanwood 24. Cheverly 25. Landover 26. New Carrollton Rolling Stock: Breda 3000 Series Alstom 6000 Series Kawasaki 7000 Series Hitachi 8000 Series
