(a) 
The chief of police shall serve as city traffic engineer in addition to his other functions and duties and without additional compensation and he shall exercise the powers and duties with respect to traffic as provided by this chapter.
(b) 
The city traffic engineer shall have the duty of determining the installation and proper timing and maintenance of traffic-control devices, of conducting engineering analysis of traffic accidents and devising remedial measures, of conducting engineering investigations of traffic conditions, of recommending appropriate traffic regulations to the city council, and of cooperating with other city officials in the development of ways and means to improve traffic conditions.
(c) 
The city traffic engineer shall place and maintain traffic-control signs, signals, and devices as may be required by this chapter and any applicable ordinances of the city to make effective the provisions of the same, and he may place and maintain the additional traffic-control devices as he may deem necessary to regulate traffic under this chapter or any applicable ordinances of the city under the laws of the state, or to guide and warn traffic.
(d) 
The city traffic engineer may place signs prohibiting or restricting the stopping, standing, or parking of vehicles on any street within the city where, in the opinion of the city traffic engineer, the stopping, standing, or parking is dangerous to those using the street or where stopping, standing, or parking would unduly interfere with the free movement of traffic on the street.
(e) 
The city traffic engineer is hereby empowered to make regulations necessary to make effective the provisions of this chapter and any applicable ordinances of the city and to make and enforce temporary or experimental regulations to cover emergencies or special conditions; provided that no temporary or experimental regulations shall remain in effect for longer than 90 days. The city traffic engineer is empowered to test traffic-control devices under actual conditions of traffic.
(1966 Code, ch. 20.2, art. V, secs. 1–5; 1994 Code, sec. 70.50)
Officers of the police department are hereby authorized to direct all traffic, either in person or by means of visible or audible signal, in conformance with the provisions of this chapter. In the event of a fire or other emergency, or to expedite traffic or safeguard pedestrians, officers of the police or fire department may direct traffic as conditions may require, notwithstanding the provisions of this chapter.
(1966 Code, ch. 20.2, art. I, sec. 3; 1994 Code, sec. 70.52)
(a) 
The chief of police is hereby empowered to make and enforce temporary regulations to cover emergencies or special conditions.
(b) 
The chief of police is hereby authorized and empowered to temporarily close streets located within the city limits, except for main thoroughfares, including but not limited to Esplanade Street, Main Street, Broadway Street, Morgan Avenue, Terrell Street, and Reuss Boulevard.
(1966 Code, ch. 20.2, art. I, sec. 4; 1994 Code, sec. 70.53; Ordinance 97-14 adopted 6/5/97)