The Mayor or the Chief of Police or the Traffic Engineer, if duly delegated by the Mayor, is hereby authorized and empowered:
(a) To make and enforce regulations necessary to make effective the provisions of this Traffic Code and to establish and enforce temporary regulations to cover emergencies or special conditions.
(b) To designate and maintain, by appropriate devices, marks or lines upon the surface of the roadway, crosswalks at intersections where, in his or her opinion, there is particular danger to pedestrians crossing the roadway, and at other places as he or she may deem necessary.
(c) To mark lanes for traffic on street pavements at such places as he or she may deem necessary and advisable, consistent with the provisions of this Traffic Code.
(d) To determine the right and left sides of laned streets by fixing and marking or designating the centerline of such streets.
(e) To establish temporarily a zone of quiet upon any street where a person is seriously ill if he or she is requested to do so by the written statement of at least one registered physician certifying as to its necessity. Such temporary zone of quiet shall embrace all territory within a radius of 200 feet of the building occupied by the person who is ill. Such temporary zone of quiet, and any other zone of quiet, shall be designated by placing at a conspicuous place in the street a sign or marking bearing the words “Quiet Zone”.
(f) To declare any street or part thereof a play street and to place appropriate signs or devices in the roadway indicating and helping to protect same.
(g) To determine the location of truck zones for the loading and unloading of materials, and to place and maintain appropriate signs indicating the same, and stating the hours during which the provisions regarding truck zones shall be applicable.
(h) To establish safety zones and safety islands of such kind and character, and at such places as he or she may deem necessary for the protection of pedestrians.
(i) To designate the streets or parts of streets upon which there shall be no stopping, standing or parking of vehicles, or upon which there shall be no standing, stopping or parking of vehicles for a limited time or during certain hours.
(j) To designate streets upon which vehicular traffic shall move in only one direction.
(k) To close temporarily or restrict the use of any street or portion thereof when required by public safety or convenience.
(l) To prohibit or require left or right hand turns by vehicles at intersections.
(m) To designate stop or yield street intersections.
(n) To designate taxicab stands.
(o) To designate by means of markers or signs placed above, within or adjacent to intersections, the lanes from which right or left turns may be negotiated by vehicles, certain types of vehicles or busses turning at such intersection.
(p) To determine those portions of any street where overtaking and passing other traffic or driving to the left of the center or centerline of the roadway would be especially hazardous, and to indicate the beginning and end of such zones by appropriate signs or markings on the street.
(q) To determine and designate intersections and other portions of the streets or highways requiring traffic and pedestrian control signals, and to place such traffic and pedestrian control signals.
(r) To erect “No U-turn” signs at any location to prohibit a vehicle from being turned so as to proceed in the opposite direction.
(s) To erect signs directing slow moving traffic to use a designated lane or allocating specified lanes to traffic moving in the same direction.
(t) To prohibit a right turn against a steady red signal at any intersection which shall be effective when signs giving notice thereof are posted at the intersection.