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 circles 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.
Blair Circle – Intersection of 16th Street, Eastern Avenue, Colesville Road, and North Portal Drive. 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, Chevy Chase and Magnolia Parkways, and Grafton Street. This circle is only half within the District; the other half is in Chevy Chase, Maryland.