Access. Access points from any one lot crossing the street line shall be limited to a maximum of two along the frontage of any single street. The center line of any separate access points shall be spaced at least 65 feet apart; shall handle no more than two lanes of traffic; shall be at least 20 feet from any property line; and shall be set back from the street line of any intersecting street at least 50 feet, or 1/2 the lot frontage, whichever is greater, except that in no case need the setback distance exceed 200 feet. Unbroken residential driveways in excess of 20 feet and unbroken commercial drive aisles in excess of 25 feet, measured at the street line, shall be prohibited. Due consideration shall be given to the proposed width, curbing, direction of traffic flow, radii of curves and method of dividing traffic lanes. Curbing shall be depressed at the driveway, or curbing may be rounded at the corners, and the driveway, connected with the street in the same manner as another street. For all non-single-family uses, parking lots shall be so designed that all vehicles leaving the facility will be traveling forward when entering the adjacent street or highway, and vehicles, when entering the facility from an adjacent street or highway, are required to be traveling in a forward direction. Access requirements are not applicable to R-4 and R-6 or GB-1 Zones in those cases where head-on and back-out parking are permitted.