A
clear-vision area shall contain no planting, fence, wall, structure,
or temporary or permanent obstruction exceeding 36 inches in height
measured from the top of the curb or, where no curb exists, from the
established street centerline grade, except:
1. Trees exceeding this height may be located in this area provided
all branches and foliage are removed to a height of eight feet above
the grade;
2. Open-wire fencing that does not obscure sight more than 10% may be
a maximum of 48 inches high.