Nothing shall be erected, placed, or allowed to grow in such a manner as to materially impede vision between a height of 30 inches and 10 feet above the center line grade of the abutting streets or driveways within the triangular area formed by the intersection street and driveway lines; and
1.
For corner lots, a straight line joining points located on the line a distance of one foot for each mile of allowed speed limit from the intersection of the street line.
2.
For a driveway entering a public street, a straight line joining points located a distance of one foot for each mile of allowed speed limit along the street line and a point a distance of 15 feet along the driveway line, from the intersection of the street and driveway lines.