List of Interstate Highways in Washington, D.C.

The Interstate Highways in Washington, D.C. comprise two current primary Interstate Highways and four current auxiliary Interstates in Washington, D.C. In addition, two proposed primary Interstates and two proposed auxiliary Interstates were cancelled in whole or in part.

Interstate Highways of the District of Columbia
System information
FormedAugust 14, 1957[1]
Highway names
InterstatesInterstate X (I-X)
System links

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.

Interstate Highways
Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-66 1.48[2]2.38 Theodore Roosevelt Bridge (I-66 / US 50) in Arlington, VAWhitehurst Freeway (US 29) in Foggy Bottom 01977-01-011977current Theodore Roosevelt Bridge, Potomac River Freeway
I-70S —— —— —01975-01-011975 Part of the planned North Central Freeway; Maryland portion was renamed I-270 in 1975
I-95 —— —— 01961-01-01196101977-01-011977 Plans to run I-95 through downtown Washington via the planned Inner Loop and North Central Freeway were scrapped, prompting I-95 to replace I-495 along the eastern half of the Capital Beltway. Portions built were re-designated I-395.
I-95 0.11[2][3]0.18 Woodrow Wilson Bridge (VA-DC-MD border) 01977-01-011977[4]current No boundary crossing signage; concurrent with I-495 since 1991
I-266 1.79[5]2.88 —— —01972-01-011972 Proposed loop route of I-66 between the District, and Arlington County, but canceled in the face of community opposition during Washington's "freeway revolts;" D.C. officials proposed designating the route Interstate 66N, a move opposed by the AASHTO.[5][6]
I-270 —— —— 01975-01-01197501977-01-011977 Part of the planned North Central Freeway; Maryland portion was known as I-70S until in 1975
I-295 7.25[7]11.67 Anacostia Freeway (I-295) in Oxon Hill, MDAnacostia Freeway (DC 295) / 11th Street Bridges (I-695) in Anacostia 01964-01-011964current Anacostia Freeway (south of the 11th Street Bridges)
I-395 3.48[7]5.60 14th Street Bridges (I-395 / US 1) in Arlington, VANew York Avenue NW (US 50) in Mount Vernon Square 01977-01-011977current 14th Street Bridges, Southwest Freeway, 3rd Street Tunnel
I-495 0.11[3]0.18 Woodrow Wilson Bridge (VA-DC-MD border) 01991-01-011991[4]current Previously existed 1961-77, reinstated 1991; no boundary crossing signage; concurrent with I-95
I-695 1.39[7]2.24 Southwest Freeway / 3rd Street Tunnel (I-395) in Southwest Federal CenterAnacostia Freeway (I-295 / DC 295) in Fairlawn 01961-01-011961current Southeast Freeway, 11th Street Bridges; signage bearing I-695 shields were added in 2011
  •       Former

See also
  •  U.S. Roads portal

References
  1. Official Route Numbering for the National System of Interstate and Defense Highways (Map). American Association of State Highway Officials. August 14, 1957. Retrieved November 22, 2010.
  2. "Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". Federal Highway Administration. Retrieved January 11, 2015.
  3. "Miscellaneous Interstate System Facts". Federal Highway Administration. April 6, 2011. Retrieved August 28, 2013.
  4. Scott M. Kozel (January 3, 2011). "Capital Beltway History". Roads to the Future. Retrieved April 18, 2015.
  5. "3-digit Interstates from I-66". Kurumi.com. Retrieved January 29, 2013.
  6. https://web.archive.org/web/20110804223018/http://www.roadstothefuture.com/roadsnova/266.html. Archived from the original on August 4, 2011. Retrieved May 21, 2014. Missing or empty |title= (help)
  7. "Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". Federal Highway Administration. Retrieved January 11, 2015.
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