U.S. Route 50 in the District of Columbia

U.S. Route 50
Map of the District of Columbia with US 50 highlighted in red
Route information
Maintained by DDOT
Length:	7.70 mi (12.39 km)
Major junctions
West end:	I‑66 / US 50 in Rosslyn, VA
	I‑66 in Foggy Bottom US 1 in Downtown Washington I‑395 in Mount Vernon Square
East end:	US 50 near Cheverly, MD
Highway system
United States Numbered Highway System List Special Divided Replaced Streets and Highways of Washington, D.C. Interstate U.S D.C. State-Named Streets ← US 29 I‑66 →

U.S. Route 50 (US 50) is a major east–west route of the U.S. Highway system, stretching just over 3,000 miles (4,800 km) from Ocean City, Maryland, on the Atlantic Ocean, to West Sacramento, California, nearly to the Pacific Ocean. In the District of Columbia, US 50 passes between Arlington County, Virginia, and Prince George's County, Maryland, predominantly along surface streets, including a part of Constitution Avenue along the National Mall.

U.S. Route 50 and Interstate 66 enter the District of Columbia from Arlington, Virginia on the Theodore Roosevelt Bridge over the Potomac River. US 50 traffic exits I-66 to Constitution Avenue, N.W., along the north side of the National Mall, passing the Lincoln Memorial, the Vietnam Veterans Memorial, the White House, the World War II Memorial, and the Washington Monument, then traveling between Federal Triangle's office buildings on the north and the Smithsonian Institution's National Museum of American History, National Museum of Natural History, and a National Gallery of Art sculpture garden to its south.