Residential, commercial, and industrial driveway aprons may not be constructed within, or partially within, any intersection curb returns. Driveway entrances shall be placed across the parkway strip in accordance with County standards and in accordance with the following requirements: Residential Driveway Entrances. The required width of the apron shall be not less than ten (10) feet. Widths may be required to correspond to the width of the driveway or parking pad, including any garage, carport, or open parking pad within twenty-five (25) feet of the street right-of-way line, but, generally, shall not be wider than twenty (20) feet. A residential driveway apron may not be constructed within, or partially within, any intersection curb filet. No residential driveway apron may be: Closer than three and one-half (3 1/2) feet to the nearest abutting property line; Closer than three and one-half (3 1/2 feet) to the outside line of a storm drainage inlet; or Closer than eighteen (18) feet of full curb height to the beginning of the flare of another driveway on any one (1) building site. Not less than one (1) standard driveway apron shall be provided for each dwelling unit abutting the permit limit in every detached, two-family, or three-family residential dwelling, as defined in the Zoning Ordinance. Nonresidential Driveway Entrances. Driveway entrances to commercial or industrial property shall have a minimum width of thirty (30) feet and a maximum width of forty-five (45) feet and shall be limited to a maximum of two (2) on each road. The Director may, in his discretion, approve additional driveways, width or dualization, or may deny the construction of a driveway entrance(s) on a street, provided access is available on another public road. In the case of a corner lot, a driveway entrance shall not be located less than twenty (20) feet from the point of curvature of the curb return as measured at the property line.