List of Washington, D.C. numbered highways
Standard markers for highways in the District of Columbia.
|Interstates:||Interstate X (I-X)|
|US Routes:||U.S. Route X (US X)|
|State:||District of Columbia Route X (DC X)|
The District of Columbia is served by the unnumbered federally maintained Clara Barton Parkway, Rock Creek and Potomac Parkway and George Washington Memorial Parkway (the latter on the west side of the Potomac River, but a portion of it is east of the Boundary Channel), along with several interstates and U.S. routes. Maintenance of roads in the District is the responsibility of the District Department of Transportation (DDOT).
Interstate 495, also known as the "Capital Beltway", creates an artificial boundary for the inner suburbs of Washington and is the root of the phrase "Inside the Beltway". Almost completely circling Washington, D.C., it crosses a tiny portion of the District at its southernmost point at the Woodrow Wilson Bridge. I-66 runs from the eastern edge of Georgetown, connects with the Beltway, and continues through Northern Virginia to I-81. I-295 comes up from the south starting at the eastern edge of the Woodrow Wilson Bridge on the Beltway and crosses the Anacostia River into downtown, linking up with I-395 (the Southwest Freeway), a major commuter route extending from New York Avenue to the Beltway and Interstate 95 in Springfield, Virginia, via I-695 (the Southeast Freeway). The Inner Loop was a proposed network of freeways in the city center; however, only portions of it were ever built. Today, the "inner loop" is most frequently used to describe the inside lanes of 495. That is those that travel clockwise around Washington.
List of routes
The chart below consists of all currently signed routes. All routes (except DC 295) that reach the district border (either into Maryland or Virginia) continue with the same desgination type and number in the bordering state.
The chart below consists of all signed routes that no longer traverse (if ever built) through the District of Columbia.
Historically, most Maryland routes that reach the district border continued into the district as D.C. Route number. Virginia has not had any state highways that crossed the Potomac River into D.C.
Note: many of these D.C. routes may have been unsigned, but still appeared on some maps.
|Interstate 70S||Unbuilt||Part of the planned North Central Freeway, which was cancelled in 1977.|
|Interstate 95||Partially built; Cancelled; Renamed||Plans to run I-95 through downtown Washington via the planned Inner Loop and North Central Freeway were scrapped; prompting I-95 to be co-signed with I-495 along the eastern half of the Capital Beltway. Portions built were redesignated I-395.|
|Interstate 266||Unbuilt||I-266 was a proposed loop route of I-66 between Washington, D.C., and Arlington County, Virginia, but canceled in 1972 in the face of community opposition during Washington's "freeway revolts".
NOTE:District of Columbia officials proposed designating the route Interstate 66N, a move opposed by the AASHTO
|Interstate 270||Unbuilt||Part of the planned North Central Freeway. I-70S was renamed I-270 in 1975.|
|U.S. Route 1 Bypass||Renamed||Current Alt US 1 was known as Bypass US 1 in the 1940s; and was cosigned with U.S. Route 50 Alternate.|
|U.S. Route 50 Alternate|
|U.S. Route 50 Bypass|
|U.S. Route 211||1928-1980
|US-211's Eastern terminus was truncated to Warrenton, Virginia, eliminating the overlap with US-29.|
|U.S. Route 240||1926-1972
|US 240 began at the intersection of Pennsylvania Avenue and 14th Street near the White House. US 240 followed Massachusetts Ave to Wisconsin Ave.|
|U.S. Route 240 Alternate||Alternate U.S. 240 ran along Connecticut Avenue with its southern end at the intersection with U.S. 240 at Dupont Circle.|
|District of Columbia Route 4||Pennsylvania Avenue was designated DC 4, an extension of Maryland Route 4 that reached at least the east side of the White House.|
|District of Columbia Route 5||D.C. Route 5 continued into Washington, D.C. on Naylor Road, Good Hope Road, and 11th Street to District of Columbia Route 4 (Pennsylvania Avenue). MD 5 was directed to follow Branch Avenue to the D.C. border and DC 5 was modified to follow Branch Avenue from the Maryland border to DC 4 (Pennsylvania Avenue), which it followed west to the White House, by 1946. By 1960, DC 5 no longer existed.|
|District of Columbia Route 193|
|District of Columbia Route 210|
|District of Columbia Route 332|
|District of Columbia Route 355|
|District of Columbia Route 396||Massachusetts Avenue|
|District of Columbia Route 500|
|District of Columbia Route 650|
- "Miscellaneous Interstate System Facts". Federal Highway Administration. April 6, 2011. Retrieved 28 August 2013.
- [dead link]
- "3-digit Interstates from I-66". Kurumi.com. Retrieved 2013-01-29.
- 1946 DC Map
- Torch & Trefoil. Fall 1968. Vol. 44, No. 1. p. 2.
- Maps on us-highways.com, including a 1946 DC map showing DC 4
- Maryland State Highway Administration (1940). Map of Maryland (Map). http://www.mdhighwaycentennial.com/images/template/gallery/maps/1940SIDE1.jpg. Retrieved 2009-03-03.
- United States Geological Survey (1946). Washington, D.C. 1:250,000 quadrangle (Map). http://www.lib.utexas.edu/maps/topo/250k/txu-pclmaps-topo-us-washington_dc-1946.jpg. Retrieved 2009-04-03.
- Firestone (1946). Map of Washington, D.C. (Map). Cartography by Rand McNally.
- Maryland State Highway Administration (1960). Map of Maryland (Map). http://www.mdhighwaycentennial.com/images/template/gallery/maps/1960SIDE1.jpg. Retrieved 2009-03-03.
- District Department of Transportation
- 1946 D.C. map on U.S. Highways: Shows the former D.C. routes.
- Road Signs of Washington, D.C.
- Washington, D.C. Highways at AARoads