List of Interstate Highways in Washington, D.C.

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

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

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 I-66 / US 50 (Theodore Roosevelt Bridge) in Arlington, VA US 29 (Whitehurst Freeway) in Foggy Bottom 01977-01-011977 current Potomac River Freeway
I-95 0.11[2][3] 0.18 I-95 / I-495 (Capital Beltway/Woodrow Wilson Bridge) 01977-01-011977 current No boundary crossing signage; concurrent with I-495 since 1991
I-195 1.90 3.06 I-395 (Southwest Freeway) in Southwest Federal Center US 50 (New York Avenue NW) in Mount Vernon Square proposed — Will replace I-395 in the Third Street Tunnel[4]
I-295 7.25[5] 11.67 I-295 (Anacostia Freeway) in Oxon Hill, MD DC 295 (Anacostia Freeway) / I-695 (Southeast Freeway) in Anacostia 01964-01-011964 current Anacostia Freeway (south of the 11th Street Bridges)
I-395 3.48[5] 5.60 I-395 (14th Street Bridges) / US 1 in Arlington, VA US 50 (New York Avenue NW) in Mount Vernon Square 01977-01-011977 current Includes 14th Street Bridges, Southwest Freeway, and 3rd Street Tunnel. I-695 will be redesignated as I-395 and the 3rd Street Tunnel will be redesignated as I-195
I-495 0.11[3] 0.18 I-95 / I-495 (Capital Beltway/Woodrow Wilson Bridge) 01991-01-011991 current Previously existed 1961–1977, reinstated 1991; no boundary crossing signage; concurrent with I-95
I-695 1.39[5] 2.24 I-395 (Southwest Freeway/3rd Street Tunnel) in Southwest Federal Center I-295 (Anacostia Freeway) / DC 295 in Fairlawn 01961-01-011961 current Southeast Freeway, 11th Street Bridges; signage bearing I-695 shields were added in 2011; will be redesignated as I-395
  •       Proposed and unbuilt


Cancelled Interstate Highways

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-70S — — — — — 01975-01-011975 Part of the planned North Central Freeway; Maryland portion was renamed I-270 in 1975
I-95 — — — — 01961-01-011961 01977-01-011977 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-266 1.79 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.
I-270 — — — — 01975-01-011975 01977-01-011977 Part of the planned North Central Freeway; Maryland portion was known as I-70S until in 1975
  •       Former

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. ^ a b "Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". Federal Highway Administration. Retrieved January 11, 2015.
  3. ^ a b "Miscellaneous Interstate System Facts". Federal Highway Administration. April 6, 2011. Retrieved August 28, 2013.
  4. ^ Special Committee on U.S. Route Numbering (November 2020). "2020 Annual (Fall) Meeting Report to the Council on Highways and Streets" (PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived from the original (PDF) on January 10, 2021. "USRN Applications" (PDF). Archived from the original (PDF) on January 10, 2021.
  5. ^ a b c "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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