The City Traffic Engineer is authorized to determine and place proper signs at those intersections at which drivers of vehicles shall not make a right, left or U turn. The making of such turns may be prohibited between certain hours of any day and permitted at other hours, in which event the same shall be plainly indicated on the signs or they may be removed when such turns are permitted.
(`78 Code, § 10.12.110.) (Ord. 1506 § 1 (part), 1978.)