(a) Except where angle parking is authorized, every vehicle stopped, standing, or parked wholly upon a two-way roadway shall be so stopped, standing, or parked with the right-hand wheels of such vehicle parallel to and within twelve inches of the right-hand curb or edge of the roadway.
(b) Except where angle parking is authorized, every vehicle stopped, standing, or parked wholly upon a one-way roadway shall be so stopped, standing, or parked parallel to the curb or edge of the roadway, in the direction of authorized traffic movement, with its right-hand wheels within twelve inches of the right-hand curb or edge of the roadway, or its left-hand wheels within twelve inches of the left-hand curb or edge of the roadway.
(c) Except where angle parking is authorized, every vehicle stopped, standing, or parked partly upon a roadway shall be so stopped, standing, or parked parallel to the curb or edge of the roadway. On a one-way roadway such vehicle shall be facing in the direction of authorized traffic movement; on a two-way roadway such vehicle shall be facing in the direction of authorized traffic movement on that portion of the roadway on which the vehicle rests.
(d) No person regularly engaged in the sale or repair of vehicles shall park a vehicle upon any highway for the purpose of: 1. Displaying such vehicle for sale. 2. Greasing or repairing such vehicle, except for such repairs as may be necessitated by an emergency.