U.S. Route 240 - History

History

See also: Maryland Route 355: History and Interstate 270 (Maryland): History

U.S. 240's original route between Maryland Route 109 and Maryland Route 85 (then part of U.S. 15) was supplanted by a new freeway alignment in 1953; U.S. 240 was diverted away from its original route onto the new freeway as it was completed south to the future alignment of the Capital Beltway. In 1956, with the arrival of the Interstate Highway System, the route gained the designation Interstate 70S (now Interstate 270).

In Maryland, the whole of U.S. 240 was redesignated as Maryland Route 355 around 1970. U.S. 240 crossed into Washington, D.C. on Wisconsin Avenue, it turns southwest onto Massachusetts Avenue (Washington, D.C.) and then south-southwest onto Connecticut Avenue at Dupont Circle. It reached U.S. Route 50 at K Street and by 1968 extended to the area around the 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.