No person shall park any vehicle, or approach the curb with a vehicle, except when headed in the direction of the traffic. Vehicles, when parked, shall stand parallel with and adjacent to the curb in such manner as to have both right wheels within twelve (12") inches of the curb, except where the Governing Body designates that vehicles shall be parked so as to have the front right wheel at the curb. Where stalls are designated either on the curb or pavement, vehicles shall be parked within such stalls. (Ref. 60-6,167, 60-680 RS Neb.)