This Life-Like accessory is listed as a new item in the company's 1975 catalog.  For its 1975 debut, Life-Like called it the Rocky Mountain Overpass.  The 1979 Life-Like price list gives $6 as this item's retail.  For 1982, Life-Like provides a different stock number, 8206, for the Twin Peaks Overpass.  This item is made out of molded LIFOAM, which was one of the original Life-Like products dating back to the company's 1950s beginnings.