Sec. 4-3.105. Crosswalk.
   “Crosswalk” shall mean that portion of the roadway included within the prolongation of the curb and property lines of an intersecting street. “Crosswalk” shall include any cross strip of highway, not to exceed twenty (20) feet in width, which is not a crosswalk by reason of intersecting highways but which shall be designated as a crosswalk by ordinance.
(§ 7111.15, T.O.O.C.)