A. The city engineer is authorized to determine those intersections at which operators of vehicles shall not make a right, left, or U-turn and shall place proper signs at such intersections. The making of such turns may be prohibited entirely or between certain hours of any day and permitted at other hours, in which event the same shall be plainly indicated on the signs, or such signs may be removed when such turns are permitted.

B. Whenever authorized signs are erected indicating that no right, left, or U-turn is permitted, no operator of a vehicle shall disobey the directions of any such sign. [Code 2004 § 12-17.]