sentences:  On January 17, 1977 when Dupont Circle station opened, both routes 40 and 42 serving the Dupont Circle station in the middle of their routes.No route changes were made during this particular time.On September 24, 1978, route 42 was extended southeast of its original terminus at the intersection of D and 13th Street NE in Kingman Park, to instead terminate at the newly opened Stadium–Armory station while route 40 began serving the new station.