High Quality Content by WIKIPEDIA articles! The Robert Moses State Parkway is an 18.42-mile (29.64 km) long north–south highway in western Niagara County, New York, United States. Its southern terminus is at the LaSalle Expressway on the east bank of the Niagara River in Niagara Falls. The northern terminus is at NY 18 at Four Mile Creek State Park in Porter near Lake Ontario. Originally, the parkway was one continuous road; however, due to low usage, a portion of the parkway near Niagara Falls was removed, separating the parkway into two sections. The length of the parkway is designated as New York State Route 957A by the New York State Department of Transportation. A 1.16-mile (1.87 km) long spur connecting the Robert Moses Parkway to Fort Niagara State Park near Youngstown is designated as New York State Route 958A. Both reference route designations are unsigned.