sentences:  At Watertown, US 11 turns northeastward to head across New York's North Country while I-81 continues on a generally northward track to the Canadian border.From there, the road continues into the province of Ontario as Highway 137, a short route leading north to the nearby Highway 401.The portion of I-81 in New York was originally developed as the Penn-Can Highway, one of four expressways proposed by the state in 1953.