The Council and other local authorities in the respective jurisdictions shall place and maintain such traffic control devices upon highways under their jurisdiction as they shall deem necessary to regulate, warn, or guide traffic. The Engineer shall place and maintain traffic control signs, signals, and devices, including signs prohibiting the stopping, standing, and parking of vehicles, when and as required by the Council under the traffic ordinances of this municipality, in order to make effective the provisions of the ordinances. All such traffic control signs, signals, and devices shall conform to the manual and specifications approved by the Commissioner of Highways where practicable, or special requirements adopted by the Council and shall, insofar as required for a particular purpose, be uniform as to type and location throughout the municipality to the extent practicable. All traffic control devices erected hereunder and not inconsistent with the provisions of state law or this section shall be official traffic control devices, and the driver of any vehicle shall obey the instructions of the official traffic control device unless otherwise directed by a traffic or police officer, subject to exceptions granted to the driver of an authorized emergency vehicle.