The Chief of Police, with the concurrence of the City Engineer, the Public Works Director, and the Fire Chief, shall have the power and duty to place and maintain or cause to be placed and maintained official traffic control signs, signals, and devices when and as required under the traffic ordinances of this City to make effective the provisions of said ordinances, and may place and maintain such additional traffic control devices, designate crosswalks, establish safety zones, or mark traffic lanes as he or she may deem necessary to regulate, warn or guide traffic under the traffic ordinances of this City or under state law. (Ord. 346 § 1, passed 12-9-2015. Code 1982 § 11-4. Code 2012 § 71.04.)