No fence, wall, hedge, or shrub planting which obstructs sight lines at elevations between two (2) and (6) feet above the street, shall be placed or permitted to remain on any corner lot within the triangular area formed by the street property lines, or in the case of a rounded property corner, from the intersection of the street lines extended. The same sightline limitations shall apply to any lot within ten (10) feet from the intersection of a street-line with the edge of a driveway, pavement, or alley line.