On any corner lot in any zoning district requiring front and side yards, no fence, wall, hedge, screen, sign, structure, vegetation or planting shall be allowed to impede vision between a height of three feet and eight feet above the centerline grades within the triangular area formed by the intersecting street right-of-way lines and a straight line joining the two street lines at points which are 30 feet distant from the point of intersection, measured along the street right-of-way line.
(Ord. passed - -, § 5.7) Penalty, see § 154.999