Location of sign. Billboards shall be located no closer than 20 feet to any property line, and shall not be located closer than 25 feet to, nor further than 75 feet from, any street or road to which the billboard is oriented, measured from the ultimate right-of-way of such street or road. Billboards may not be closer than 800 feet to another billboard measured linearly on the same side of the street or road to which the billboard is oriented; and shall not be closer to another billboard than 500 feet if the billboards are on opposite sides of the street or road to which the billboards are oriented. No billboard shall be located within 500 feet of any right-of-way of any interchange, measured along the interstate or limited access primary highway from the beginning or ending of pavement widening at the exit from or entrance to the main-traveled way. No billboard shall be located within 800 feet of the edge of any street or road (other than the street or road to which the billboard is oriented) measured linearly on the same side of the street or road to which the billboard is oriented. No billboard shall be erected within a three-hundred-foot circumference of the nearest property line of any of the following: historic site, school, church or other religious institution, retirement or nursing home, cemetery, government building, community center or public park, playground or recreational area. No billboard shall be located within 500 feet of any existing residential dwelling or residential zoning district on the same side of the street or road to which the billboard is oriented.