On a corner lot in any residential district, nothing shall be erected, placed, planted, or allowed to grow in such a manner as materially to impede vision between a height of two and one-half and ten feet above the centerline grades of the intersecting streets in the area bounded by the street lines of such corner lots and a line joining points along said street lines fifty feet from the point of the intersection.
(Ord. 81-11 Art. XIV § 2, 1980).