The Beaver Island Parkway, also known as South Parkway, is a parkway connecting its namesake park to I-190 (the Niagara Section of the New York State Thruway) and New York State Route 324 (NY 324) near the South Grand Island Bridge. This roadway is a four-lane divided expressway, and there are no driveways leading to and from the roadway. However, there are at-grade intersections along the route. The parkway is within the jurisdiction of the New York State Office of Parks, Recreation and Historic Preservation but is maintained and inventoried by the New York State Department of Transportation (NYSDOT) as NY 957B, an unsigned reference route.