No fence, wall, shrubbery, sign or other obstruction to vision, above a height of three feet from the established street grades, shall be permitted within the triangular area formed at the intersection of any thoroughfare right-of-way lines by a straight line drawn between said right-of-way lines at a distance along each line of twenty-five feet from their point of intersection.
(Ord. 260. Passed 7-9-79.)