300.220. 1. The city traffic engineer is authorized toplace markers, buttons, or signs within or adjacent tointersections indicating the course to be traveled by vehiclesturning at such intersections, and such course to be traveled asso indicated may conform to or be other than as prescribed by lawor ordinance.
2. When authorized markers, buttons, or other indicationsare placed within an intersection indicating the course to betraveled by vehicles turning thereat, no driver of a vehicleshall disobey the directions of such indications.
(L. 1965 p. 445 ยง 44)