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► 4 <br /> the boundary of Economic Development Districts as well as <br /> between Primary and Secondary Development Areas within the <br /> Districts . <br /> To separate and protect residential uses adjacent to a <br /> highway and provide pleasant visual experiences when viewed <br /> from the public right - of - way , a buffer of 100 feet in width <br /> is to be maintained adjacent to the right - of - way of <br /> interstate highways . <br /> Buffers may consist of existing wooded areas or , 2. <br /> if <br /> existing ; vegetation is not sufficient for screening , a <br /> planted buffer shall be provided , consisting of 50 - 75 % <br /> evergreen trees reach a mature height of at least 30 feet . <br />