Tonawanda West Digital Raster Quadrangle (Map). 1:24,000. New York State Department of Transportation. 1996. Retrieved April 10, 2009. The highway linking the Niagara Scenic Parkway to the LaSalle Expressway is part of the same internal state highway (SH C68002) as the westernmost portion of the LaSalle mainline, making it a spur of the LaSalle.