On a corner lot in any district, nothing shall be erected, placed, planted, or allowed to grow in such a manner as to materially impede vision between a height of two and one-half and ten feet above the center line grades of the intersecting streets in the area bounded by the right-of-way lines of such corner lots and a line joining points along said street lines fifty feet from the point of intersection. (Ord. 553. Passed 1-24-94.)