sentences:  Route 45 operated between Mount Pleasant and the Bureau of Engraving and route 46 operated between Mount Pleasant and the Kennedy Center.On January 4, 1981, roughly two months after the Capitol Heights station opened, route 40 was truncated to only operate between Mount Pleasant and Capitol Heights station, via Metro Center, Washington Union Station, and Stadium–Armory station.The segment of 40's routing between Capitol Heights station and the former terminus in Seat Pleasant, Maryland, was replaced by route F14.