No person shall park a vehicle upon any roadway for the principal purpose of:
(1) Displaying such vehicle for sale; or
(2) Washing, greasing, or repairing such vehicle, except repairs necessitated by an emergency.
(Sec. 15-14.7, R.O. 1978 (1983 Ed.)) (1990 Code, Ch. 15, Art. 14, § 15-14.7)