(a) 
The transportation services manager 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 title.
(b) 
Whenever the vehicle code 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 transportation services manager is hereby authorized to install or cause to be installed the necessary devices subject to any limitations or restrictions set forth in the law applicable thereto.
(c) 
The transportation services manager may also place and maintain or cause to be placed and maintained such additional traffic-control devices as he may deem necessary or proper to regulate traffic or to guide or warn traffic, but he shall make such determination only upon the basis of traffic engineering principles and traffic investigations and in accordance with such standards, limitations and rules as may be set forth in this title, or as may be determined by ordinance or resolution of the city council.
(Code 1960, § 3404.0; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
No provision of the vehicle code or of this title for which signs are required shall be enforced against an alleged violator unless appropriate legible signs are in place giving notice of such provisions of the traffic laws.
(Code 1960, § 3404.1; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
The operator of any vehicle or train, or any pedestrian, shall obey the instructions of any official traffic control device placed in accordance with this title, 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.
(Code 1960, § 3404.2; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
Until removed or relocated as provided in this title, all traffic-control devices heretofore installed and in place as of the effective date of this title are hereby approved.
(Code 1960, § 3404.3; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
(a) 
The transportation services manager is hereby directed to propose funding for construction of and to maintain traffic signals at those intersections and other places where traffic conditions are such as to benefit from alternate interruption and release of traffic flow in order to prevent or relieve traffic congestion or to protect life or property.
(b) 
The transportation services manager 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 their determinations therefrom shall be made in accordance with those traffic engineering and safety standards set forth in the California Manual on Uniform Traffic Control Devices issued by the Department of Transportation of the State of California.
(c) 
Whenever the transportation services manager installs and maintains an official traffic signal at any intersection, they shall likewise erect and maintain at such intersection street name signs visible to the principal flow of traffic, unless such street name signs have been previously placed and are maintained at any such intersection.
(d) 
For the purpose of this section, an official traffic signal is any device, whether manually, electrically or mechanically operated, by which traffic is alternately directed to stop and proceed and which is erected by authority of a public body or official having jurisdiction.
(Code 1960, § 3404.4; Ord. No. 66-35, 8-15-66; Ord. No. 87-26, § 2, 12-7-87; Ord. No. 2024-09, 7/16/2024)
The transportation services manager is hereby 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.
(Code 1960, § 3404.5; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
The transportation services manager is authorized to place and maintain distinctive roadway markings as described in the vehicle code on those streets and 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 marking or signs and markings. Such marking or signs and markings shall have the same effect as similar markings placed by the state department of public works pursuant to the provisions of the vehicle code.
(Code 1960, § 3404.6; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
The transportation services manager is hereby authorized to remove, relocate or discontinue the operation of any traffic-control device not specifically required by the vehicle code or this title, whenever they shall determine in any particular case that the conditions which warranted or required the installation no longer exist or remain.
(Code 1960, § 3404.7; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
The transportation services manager shall determine the hours and days during which any traffic-control device shall be in operation or in effect, except in those cases where such hours or days are specified in this title.
(Code 1960, § 3404.8; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)
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.
(Code 1960, § 3404.9; Ord. No. 66-35, 8-15-66; Ord. No. 2024-09, 7/16/2024)