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City of San Mateo Municipal Code.

11.16.030 TURNING MARKERS.

(a) The City Manager may place markers, buttons or signs within, or adjacent to, intersections, indicating the course to be traveled by vehicles turning at such intersections.

(b) When authorized markers, buttons or other indications 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 indications.