Washington Metro rapid transit line
Orange LineStatus Operating Locale Fairfax County Arlington
Washington, D.C. Prince George's County , MD Termini Stations 26 Type Rapid transit System Washington Metro Operator(s) Washington Metropolitan Area Transit Authority Rolling stock 3000-series , 6000-series , 7000-series Opened November 20, 1978; 45 years ago (November 20, 1978 ) 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
Orange Line highlighted in orange
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Multiple services sharing track
All stations are accessible
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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. The Orange Line runs from Vienna in Virginia to New Carrollton in Maryland. Half of the line's stations are shared with the Blue Line and over two thirds are shared with the Silver Line . Orange Line service began on November 20, 1978.
Trains run every 10 minutes during weekday rush hours, every 12 minutes during weekday off-peak hours and weekends, and every 15 minutes daily after 9:30pm.[ 1]