On corner lots in the residence zones, Professional Zone, Agricultural Zone, Business Zone, Elderly Residential Zone, Elderly Congregate Residential Zone, and Residential Condominium Reuse Zone, no building, fence or other structure shall be erected and no tree, shrub, or other planting shall be planted or allowed to exist which prevents an unobstructed view through the space between three feet and eight feet above the ground within the area formed by the intersecting street lines forming the corner of the intersecting streets and a line joining points on such lines 25 feet distant from the point of intersection of said street lines. When the junction of the street lines of the two intersecting streets forms a curve, the clearance area shall be determined by the Building Commissioner as nearly as may be in accordance with the foregoing and having regard for the safety of the public, and the foregoing provisions shall apply to the area thus determined. The Building Commissioner shall file with the Planning Board a plan showing the area so determined by him. The provisions of this section shall be superior to and control any inconsistent provisions of this Zoning Bylaw.