(a) Placing of stop or yield signs. It shall be the duty of the Traffic Engineer to place and maintain a stop or yield sign at each and every street intersecting a through street, except that no stop sign shall be placed or maintained on any street intersecting another where a traffic-control signal is located and operating.
(b) Determination of business districts. The Traffic Engineer shall, after proper investigation, determine what portions of the city are within business districts as defined in § 301.01, and erect signs so indicating and setting forth the speeds therein.
(c) Maintenance of traffic-control devices. It shall be the duty of the Traffic Engineer to maintain traffic-control devices as required under the provisions of this Traffic Code. All signs and signals designated for a particular purpose shall be uniform, and conform to the Ohio Manual of Uniform Traffic-Control Devices for Streets and Highways, as set forth in Ohio R.C. 4511.09.