The points of access shall consist of access ways from abutting property to the adjacent traffic lane or roadway, and their locations shall be expressed in terms of “stations,” each representing a distance of 100 feet, measured along the centerline of the controlled access facility from the points of reference stated in Section 140.06 of this chapter. Such measurements shall refer to the center of the access ways, which shall be a maximum of 18 feet for agricultural purposes and a maximum of 35 feet in width for commercial purposes, and 80 feet in width for public street purposes.