Increasing yard depth when abutting a lot in a residential district. A buffer area of at least 30 feet in width containing evergreen landscaping, fencing or some other method as, in the judgment of the Planning Board, will be adequate to screen the use from the neighboring residential area, shall be required along all adjoining residential property boundaries (hereinafter referred to as the buffer). Where a lot in a highway development district abuts a lot in a residential district, whether the residential lot is vacant or not, the existing vegetation on the highway development district lot within the buffer shall remain undisturbed until site plan approval from the Planning Board has been obtained. The buffer shall not be utilized for roadways, parking or storage of any material or goods on a temporary or permanent basis. Existing vegetation along the property lines and within the buffer shall be preserved and enhanced as deemed appropriate by the Planning Board during site plan review to maintain visual character and reduce impacts to residential lots. The buffer may include fencing, berming, vegetation or a combination thereof to extent necessary to minimize any visual impact to residential lots. The Planning Board may require that any new screening be installed prior to the commencement of construction to protect the residential lots.