(A) Authority To Place: The city is authorized to place markers, buttons or signs within or adjacent to intersections indicating the course to be traveled by vehicles turning at such intersections, and such course to be traveled as so indicated may conform to or be other than as prescribed by this code.
(B) Obedience To Markers: When authorized markers, buttons or other indicators are placed within an intersection indicating the course to be traveled by vehicles turning thereat, no driver of a vehicle shall disobey the directions of such indicators. (1958 Code ch. IX art. 5)