Except when necessary, in obedience to traffic regulations or traffic signs or signals, the operator of a vehicle shall not stop, stand or park a vehicle in a roadway, other than parallel with the edge of the roadway, headed in the direction of the traffic, and with the curbside wheels of the vehicle within six inches of the edge of the curb, except upon those streets which have been marked or signed for angle parking, in which case vehicles shall be parked at the angle to the curb indicated by the sign and within the sign lines and/or roadway.
(1981 Code, § 14.21) Penalty, see § 70.99