A. 
The Traffic Engineer shall have the power and duty to place and maintain or cause to be placed and maintained official traffic-control devices when and as required to make effective the provisions of this chapter.
B. 
Whenever the California Vehicle Code or this chapter requires for the effectiveness of any provision thereof that traffic-control devices be installed to give notice to the public of the application of such law, the City Traffic Engineer shall place and maintain, or cause to be placed and maintained, such appropriate signs, signals or other traffic-control devices as may be authorized hereunder or by the California Vehicle Code, or as may be necessary to carry out the provisions of this chapter or the California Vehicle Code, or to warn or guide traffic upon the highways.
C. 
The City Traffic Engineer may also place and maintain or cause to be placed and maintained such additional traffic-control devices as he or she may deem necessary and proper to regulate traffic or to guide or warn traffic, but the City Traffic Engineer shall make such determination only upon the basis of traffic engineering principles and traffic investigation, and in accordance with such standards, limitations and rules as may be set forth in this chapter or as may be determined by ordinance or resolution of the City Council.
(Prior code § 70.15)
No provision of the California Vehicle Code or of this chapter for which signs are required shall be enforced against an alleged violator unless legible signs are in place giving notice of such provisions of the traffic laws.
(Prior code § 70.16)
The operator of any vehicle or train shall obey the instructions of any official traffic-control device placed in accordance with this chapter unless otherwise directed by a police officer or other authorized person subject to the exceptions granted the operator of an authorized emergency vehicle when responding to emergency calls.
(Prior code § 70.17)
A. 
The City Traffic Engineer is directed to install and maintain official traffic signals at those intersections and other places where traffic conditions are such as to require that the flow of traffic be alternately interrupted and released in order to prevent or relieve traffic congestion or to protect life or property from exceptional hazard.
B. 
The City Traffic Engineer shall ascertain and determine the locations where such signals are required by field investigation, traffic counts and other traffic information as may be pertinent and such determinations therefrom shall be made in accordance with those uniform standards and specifications promulgated by the Department of Transportation.
C. 
Whenever the City Traffic Engineer installs and maintains an official traffic signal at any intersection, he or she shall likewise erect and maintain at such intersection street name signs clearly visible to traffic approaching from all directions unless such street name signs have previously been placed and are maintained at any such intersection.
(Prior code § 70.18)
The City Traffic Engineer is authorized to mark center lines and lane lines upon the surface of the roadway to indicate the course to be traveled by vehicles and may place signs temporarily designating lanes to be used by traffic moving in a particular direction, regardless of the center line of the highway.
(Prior code § 70.19)
The City Traffic Engineer is authorized to place and maintain distinctive roadway markings as described and with the effect set forth in California Vehicle Code Section 21460 on those streets or parts of streets where the volume of traffic or the vertical or other curvature of the roadway renders it hazardous to drive on the left side of such markings or signs and markings.
(Prior code § 70.20)
The Traffic Engineer is authorized to remove, relocate or discontinue the operation of any traffic-control device not specifically required by the California Vehicle Code or this chapter whenever he or she shall determine in any particular case that the conditions which warranted or required the installation no longer exist or obtain.
(Prior code § 70.21)
The City Traffic Engineer shall determine the hours and days during which any traffic-control device shall be in operation or be in effect, except in those cases where such hours or days are specified in this chapter.
(Prior code § 70.22)
No person, unless authorized by the City, shall paint any street or curb surface; provided, however, that this section shall not apply to the painting of numbers on a curb surface by any person who has complied with the provisions of any resolution or ordinance of the City pertaining thereto.
(Prior code § 70.23)
The City Traffic Engineer is authorized to place official traffic-control devices within or adjacent to intersections and indicating the course to be traveled by vehicles turning at such intersections, and the City Traffic Engineer is authorized to locate and indicate more than one lane of traffic from which drivers of vehicles may make right or left-hand turns, and the course to be traveled as so indicated may conform to or be other than as prescribed by law or ordinance.
(Prior code § 70.24)
The City Traffic Engineer is authorized to determine and place proper signs at those intersections at which drivers of vehicles shall not make a right, left or U turn. The making of such turns may be prohibited between certain hours of any day and permitted at other hours, in which event the same shall be plainly indicated on the signs or they may be removed when such turns are permitted.
(Prior code § 70.25)
Whenever any ordinance or resolution of the City designates any one-way street or alley, the City Traffic Engineer shall place and maintain signs giving notice thereof, and no such regulations shall be effective unless such signs are in place. Signs indicating the direction of lawful traffic movement shall be placed at every intersection where movement of traffic in the opposite direction is prohibited.
(Prior code § 70.26)
Whenever any ordinance or resolution of the City designates and describes any street or portion thereof as a through street, or any intersection at which vehicles are required to stop at one or more entrances thereto, or any railroad grade crossing at which vehicles are required to stop, the City Traffic Engineer shall erect and maintain stop signs on each and every street intersecting such through street or portion thereof so designated and at those entrances to other intersections where a stop is required and at any railroad grade crossing so designated; provided, however, stop signs shall not be erected or maintained at any entrance to an intersection when such entrance is controlled by an official traffic-control signal. Every such sign shall conform with and shall be placed as provided in the California Vehicle Code.
(Prior code § 70.27)