Vision clearance at corners

At street line intersections, in all districts, no building or structure shall be erected between a height of three (3) feet and ten (10) feet above street level and no vegetation shall be planted or allowed to grow above a height of three (3) feet above the street level within the triangle formed by the two (2) intersecting street lines and a third line joining points on these street lines fifteen (15) feet from the intersection. Poles not exceeding six (6) inches in diameter are exempted from this regulation.