2.4   Parking Lanes
   A.   A parking lane is eight feet in width and parallel with the curb, if used with a vertical curb and measured from the face of the vertical curb, or, if used with a wedge curb and measured from the back of the wedge curb. Exception: seven feet is acceptable on local roads when the ADT is less than 1,000.
   B.   When wedge curbs are permitted, they may be included as a part of the parking lane.
   C.   Parking is prohibited on arterial and collector streets, unless specifically authorized by the Mayor and Council or the .
   D.   Local streets must be designed with parking on both sides of the street, unless parking is provided in common areas distributed throughout the subdivision, at a ratio of one parking space per dwelling within the subdivision.