Complex sentence: The southern terminus of the route is in Laurel, Delaware at an intersection with U.S. Route 13, while the highway's northern terminus is a dead end in Champlain, NY, just short of the United States-Canada border.
Split into simpler sentences: The southern terminus of the route is in Laurel, Delaware at an intersection with U.S. Route 13. While, the highway's northern terminus is a dead end in Champlain, NY, just short of the United States-Canada border.