The Surface Road Layout in Washington, D.C. consists primarily of numbered streets along the north-south axis and lettered streets followed by streets named in alphabetical order along the east-west axis. Avenues named for each of the fifty U.S. states crisscross this grid diagonally. Traffic Circle s often occur where avenues intersect with each other and with streets. Neighborhoods are often identified by nearby traffic circles. Circles are often named for American Civil War generals and admirals.
- Anna J. Cooper Circle - Intersection of 3rd and T Streets
- Blair Circle - Intersection of 16th Street, Eastern Avenue, Colesville Road, and North Portal Drive. (Note, this circle is only half within the District. The other half is in Silver Spring , Maryland )
- Chevy Chase Circle - Intersection of Western and Connecticut Avenues, and Chevy Chase and Magnolia Parkways and Grafton Street (Note, this circle is only half within the District. The other half is in Chevy Chase , Maryland )
- Dupont Circle - Intersection of Connecticut , Massachusetts , and New Hampshire Avenues, and 19th and P Streets, with an Underpass for Connecticut Avenue and an Express Lane for Massachusetts Avenue
- Grant Circle - Intersection of New Hampshire and Illinois Avenues and Varnum and 5th Streets
- Logan Circle - Intersection of Rhode Island and Vermont Avenues and 13th and P Streets
- Observatory Circle - Intersection of Massachusetts Avenue and 34th Street. Technically, an Arc , not a circle, as the street fails to form a complete loop. (''See United States Naval Observatory and Number One Observatory Circle .'')
- Peace Circle - Intersection of First Street, and Pennsylvania Avenue
- Pinehurst Circle - Intersection of Western and Utah Avenues and 33rd and Worthington Streets (note, this forms a semi-circle along the border with Maryland)
- Scott Circle - Intersection of Rhode Island and Massachusetts Avenues, 16th Street
- Sheridan Circle - Intersection of Massachusetts Avenue and R and 23rd Streets
- Sherman Circle - Intersection of Kansas and Illinois Avenues and Crittenden and 7th Streets
- Tenley Circle - Intersection of Wisconsin and Nebraska Avenues, and Fort Drive and Yuma Street
- Thomas Circle - Intersection of Massachusetts and Vermont Avenues, 14th and M Streets with an underpass for Massachusetts Avenue
- Ward Circle - Intersection of Massachusetts and Nebraska Avenues
- Washington Circle - Intersection of New Hampshire and Pennsylvania Avenues, and K and 23rd Streets with a K Street underpass
- Westmoreland Circle - Intersection of Western and Massachusetts Avenues, Butterworth Place, and Wetherill Road (Note, this circle is only half within the District. The other half is in Maryland .)
- Columbus Circle - Intersection of Delaware, Louisiana and Massachusetts Avenues and E and First Streets (Note, Union Station and its access roads interrupts this circle on one side)
- Truxton Circle - Now defunct, existing only as the name of a neighborhood, formerly the intersection of Florida Avenue and North Capitol Street, Q Street Northwest and Q Street Northeast (Note, this circle lies on the border of Northwest and Northeast, there are possible plans to rebuild the circle)
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