(a) Official Traffic Control Devices. The Service-Safety Director shall place and maintain traffic control devices when and as required under this Traffic Code to make effective the provisions of this Traffic Code, and may place and maintain such additional traffic control devices as he may deem necessary, with the approval of the Traffic Commission, to regulate traffic or to guide or warn traffic.
All traffic control devices shall conform to the manual and specifications approved by the State Department of Transportation. All traffic control devices so erected and not inconsistent with the provisions of State law or this Traffic Code shall be official traffic control devices.
(b) Recommendations. The Service-Safety Director is directed to study and investigate the need for, submit recommendations as to and in accordance with the State law and ordinances of this City, designate and maintain by appropriate devices, signs or lines upon the pavement, the following:
(1) Crosswalks at intersections.
(2) Safety zones.
(3) Lanes for traffic on street pavements.
(4) Restrictions on right, left or "U" turns.
(5) Courses to be traveled by vehicles at intersections.
(6) Temporary zones of quiet.
(7) Play streets.
(8) Bus stops.
(9) Taxi stands.
(10) Stands for other passenger common carrier motor vehicles.
(11) Passenger zones and freight loading zones.
(12) No parking regulations upon any street.
(13) No stopping regulations upon any street.
(14) Alterations in established speed limits.
(c) Stop Signs. Whenever any law or ordinance designates and describes a through street or a stop intersection, it shall be the duty of the Service-Safety Director to place and maintain one or more standard stop signs on each and every street intersecting such through street or that portion thereof described and designated as such, and to erect and maintain a stop sign at one or more entrances to any such stop intersection as specified by law or ordinance.
(d) One-Way Signs, Parking Signs. Whenever by any ordinance a one-way street is described or any time-limit parking is imposed, it shall be the duty of the Service-Safety Director to erect appropriate signs giving notice thereof, and no such regulations shall be effective until such signs are erected.
(e) Temporary Regulations. The Service-Safety Director, by and with the approval of the Traffic Commission, may make temporary rules regulating traffic or for testing traffic control devices under actual conditions of traffic. No such temporary rule regulating traffic shall remain in effect for more than ninety days.