No driveway shall be constructed or graded as to leave a steep, sharp depression or other obstruction in the sidewalk. The grade shall be as nearly as possible the same as that of the adjoining sidewalk. It shall be unlawful to have the surface finish of any driveway where the same crosses the sidewalk constructed of materials as to render it slippery or hazardous to pedestrians or to have the grade of the portion vary from the grade of the sidewalk or be other than level.
(`70 Code, § 19-79) Penalty, § 94.999