Lincoln Memorial . Signs for U.S. 240 within Washington existed at least into the early 1970s, when the route was deleted in its entirety, leaving I-70S (now I-270) as the sole route following the original freeway. In addition, Alternate U.S. 240 ran along Connecticut Avenue through Washington D.C. and Maryland inside the Washington Beltway with its southern end at the intersection with U.S. 240 at Dupont Circle. Junction list See also References External links US 240 @ MDRoads.com Endpoints of historic U.S. Highway 240 40-2 40-2 40-2 2 40-2