Parallel parking. Parking parallel to curb or building shall require 22 feet long parking spaces, nine feet wide. Parking spaces for persons with disabilities shall conform to the applicable federal and state standards as to number and dimensions, and shall be located near building entrances and wheelchair ramps. No parking space shall obstruct the exit path from any other space or be located as to require backing out into or from a street. For driveway curves, the smaller radius shall be not less than 12 feet, and the width of a driveway, where the driveway it is not used for maneuvering in and out of parking spaces, shall not be less than 10 and not more than 15 feet for one-way and not less than 20 and not more than 30 feet for two-way traffic, except that for parking lots with a capacity of 10 or fewer parking spaces and for garages, driveway entrances and exits may be reduced with Planning Board approval to not less than 12 feet for two-way traffic. Lots for 200 or more parking spaces shall have more than one two-way access, located so as to serve different parts of the parking lot. Parking lots designed to include parking for trucks, buses, or other large vehicles shall have designated parking spaces, driveways, and access ways large enough to accommodate such vehicles. In order to screen parking to the greatest extent, wherever and whenever possible, parking shall be located to the rear and sides of buildings.