(a) No person shall stop, stand or park a vehicle upon any roadway for the principal purpose of:
(1) Displaying such vehicle for sale;
(2) Washing, greasing or repairing such vehicle except repairs necessitated by an emergency.
(b) Whoever violates this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.