Following Connecticut Avenue northbound, the routes serve multiple stations of the Red Line, namely the Woodley Park, Cleveland Park, and Van Ness, until the Red Line diverts from Connecticut Avenue.

Both routes terminate at Chevy Chase Circle, just south of Western Avenue and the Maryland state line.

Essentially the L1 and L2's continuation into Maryland, the L8 begins at the nearby Friendship Heights station and serves Connecticut Avenue in Chevy Chase, Kensington, and Aspen Hill.

Route L2 would operate directly along Connecticut Avenue between Chevy Chase Circle and Farragut Square, while using the underpass at Dupont Circle, except for a diversion via Calvert Street and Columbia Road.

[13] On September 26, 2020, WMATA proposed to eliminate all route L1 service due to low federal funding.

[14] In February 2021, WMATA proposed to eliminate the L2 and replace it with a modified H2 and H4 which would run along Connecticut Avenue north of Calvert Street NW and Routes 42 and 43 south of Columbia Road NW to replace the L2 if WMATA does not get any federal funding.

[15] On September 5, 2021, Route L2 service was increased to operate every 20 minutes daily between 7:00 AM to 9:00 PM.