Buffer Area. In the ORL zone, the buffer area shall be an area in which no building, parking area, sign (except directional sign) or storage of materials shall be permitted, but such area shall permit an access road, underground utilities and their appurtenances for uses in the ORL zone, provided that such access road, underground utilities and appurtenances shall be located, to the extent possible considering environmental constraints, as far as practicable from the adjacent property. Where the distance between the access road, underground utilities and appurtenances from the adjacent property is less than one hundred fifty (150) feet, the buffer area shall include a continuous screen. A continuous screen shall consist of natural vegetation or landscaping to minimize the impact of an access road on adjacent property. Where existing vegetation does not provide adequate screening of the access road, the existing vegetation shall be supplemented with other plantings or landscaping. Additional planting or landscaping shall not be required if such planting or landscaping would be regulated by the Freshwater Wetlands Protection Act.