Blue Line (Washington Metro)

Blue Line
Blue Line
	Blue Line train at Federal Triangle in April 2025
Overview
Status	Operating
Locale	Fairfax County, VA; Alexandria, VA; Arlington, VA; Washington, D.C.; Prince George's County, MD, U.S.
Termini	Franconia-Springfield; Largo;
Stations	28
Service
Type	Rapid transit
System	Washington Metro
Operator(s)	Washington Metropolitan Area Transit Authority
Rolling stock	3000-series, 6000-series, 7000-series
History
Opened	July 1, 1977
Technical
Line length	30.3 mi (48.8 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
Route map
Route map
	I-495
	Capital Beltway
	MD
	DC
	DC 295
	Anacostia Freeway
	First Street Tunnel
	to Washington Union Station
	I-395
	Third Street Tunnel
	to Greenbelt
	to Mount Vernon Square
	DC
	VA
	I-66
	Custis Parkway
	to Vienna
	to Ashburn
	I-395
	Shirley Highway
	Crystal
	City
	Alexandria
	Union Sta.
	I-495
	Capital Beltway
	RF&P Subdivision
	to Richmond
	All stations are accessible

The Blue Line is a rapid transit line of the Washington Metro system, consisting of 28 stations in Fairfax County, Alexandria and Arlington, Virginia; Washington, D.C.; and Prince George's County, Maryland, United States. The Blue Line runs from Franconia–Springfield to Largo. The line shares track with the Orange Line for 13 stations, the Silver Line for 18, and the Yellow Line for six on the same segment and seven altogether. Only three stations (Franconia–Springfield, Van Dorn Street, and Arlington Cemetery) are exclusive to the Blue Line.

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.