The Traffic Engineer is authorized to place official traffic control devices within or adjacent to intersections, and such course to be traveled as so indicated may conform to or be other than as prescribed by law. On state-aid and state highways, the authority of the Traffic Engineer is subject to State Highway Commission approval.
The Traffic Engineer is hereby authorized to determine those intersections at which drivers 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 between certain hours of any days and permitted at other hours, in which event the same shall be plainly indicated on the signs, or the signs may be removed when such turns are permitted. On state-aid and state highways, the authority of the Traffic Engineer is subject to State Highway Commission approval.