State Route 400
Washington Street
Route information
Maintained by VDOT
Length	1.79 mi[1] (2.88 km)
Existed	early 1980s–present
Major junctions
South end	George Washington Parkway in Alexandria
Major intersections	SR 236 in Alexandria SR 7 in Alexandria
North end	George Washington Parkway in Alexandria
Location
Country	United States
State	Virginia
Counties	City of Alexandria
Highway system
Virginia Routes Interstate US Primary Secondary Byways History HOT lanes
← SR 399 → SR 401

State Route 400 (SR 400) is a primary state highway in the U.S. state of Virginia. Locally known as Washington Street, the state highway runs 1.79 miles (2.88 km) from the south city limit of the independent city of Alexandria, Virginia north to 1st Street, still within Alexandria. SR 400 is a city street connection through Old Town Alexandria between the two segments of George Washington Memorial Parkway, one heading south toward Mount Vernon and one heading north toward District of Columbia. The Virginia Department of Transportation assigned the unsigned SR 90005 designation to run concurrently along the entire length of the parkway and of SR 400.^[1]

Route description

SR 400 begins at the south city limit of Alexandria at Hunting Creek. The highway continues south into Fairfax County and Belle Haven as the George Washington Memorial Parkway toward Mount Vernon. SR 400 is a four-lane divided highway through the Jones Point neighborhood before becoming undivided and crossing over the Capital Beltway (I-95 and I-495) on a freeway cap, a very wide overpass that shields the freeway from view of the crossing highway, between the Woodrow Wilson Bridge over the Potomac River and the Capital Beltway's interchange with U.S. Route 1 (US 1). The first intersection north of the bridge is with Church Street, which receives a ramp from the westbound Capital Beltway. SR 400 continues through Old Town Alexandria with six lanes and passes the Davis Chapel. The state highway meets the eastern ends of SR 236 (Duke Street) and SR 7 (King Street) in the Alexandria Historic District, where the Lyceum and Beulah Baptist Church line the southbound side of the street and the statue Appomattox lies in the middle of the street at its intersection with Prince Street. SR 400 continues north past the Christ Church, the Lloyd House, and the Lee-Fendall House to its northern terminus at First Street. George Washington Memorial Parkway resumes at this intersection and continues toward Arlington and Washington.^[1][2]

History

Most of SR 400, from Franklin Street to Powhatan Street, was once part of US 1, and the present alignment (roughly) of US 1 was then US 1 Truck.^[3]

Major intersections

The entire route is in Alexandria.

mi[1]	km	Destinations	Notes
0.00	0.00	George Washington Parkway south – Mount Vernon	Southern terminus of G.W. Parkway concurrency
		Church Street	Funnels traffic from I-495 north exit 177C
0.91	1.46	SR 236 west (Duke Street)	Eastern terminus of SR 236, Duke Street continues east
1.07	1.72	SR 7 west (King Street)	Eastern terminus of SR 7, King Street continues east
1.79	2.88	George Washington Parkway north / First Street – Washington	Northern terminus of G.W. Parkway concurrency
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus