A. 
The city 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 code.
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 city manager is 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 city manager may also place and maintain, or cause to be placed and maintained, such additional traffic-control devices as he or she may deem necessary or proper to regulate traffic or to guide or warn traffic, but he or she 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 code or as may be determined by ordinance or resolution of the council.
D. 
All stop signs and other signs heretofore set up in place by authority of the council or by authority of the city manager for the purpose of regulating vehicular or pedestrian traffic on the public highways, inclusive of any and all parking stalls, buttons or markings, inclusive of all markings on curbs for the regulation of vehicular and pedestrian traffic, together with all crosswalk markings, are approved and confirmed as lawfully having been authorized and empowered to maintain or replace the same as occasion may require.
E. 
For the purpose of regulating vehicular and pedestrian traffic on the public highways of the city, and for the safety and welfare of the public generally, the city manager is expressly authorized and empowered and directed to secure and set out, or establish in place, such other or further signs or to cause such further markings on such public highways to be made as in his or her judgment appear proper and necessary. It is made the duty of the city manager constantly to study and to be familiar with both traffic and pedestrian conditions within the city, and to place such signs or to make such markings for the regulation and control of the safety of the public. Any and all signs or markings thus established by the city manager shall be in compliance with the Vehicle Code of the state of California and with the ordinances pertaining to the subject matter heretofore adopted by the council and calculated and purposed for the safety of the general public. Any sign or markings for the purposes stated thus provided or established by the city manager within the scope of these provisions shall be conclusively deemed and taken as established and maintained by the direct authority of the council, and shall not be questioned. The city manager shall pay particular attention to the regulation of both vehicular and pedestrian traffic on streets adjacent to or approaching public schools, theaters, churches or other like places where traffic regulations are necessary or proper and within the scope of the provisions of the Vehicle Code of the state of California and the prior ordinances on the subject matter of the city; he or she is also expressly authorized to make such markings on the streets or establish or set up such signs as to him or her appear proper or necessary, inclusive of heavily marked crosswalks, zigzag lines indicating caution or other appropriate markings or signs. The council continues to reserve its ultimate authority over any and all such matters, but any and all of such signs, markings or other observable regulations made by the city manager hereunder shall be deemed and conclusively taken as by express and direct action of the council through its administrative officer and are approved and confirmed by the council as its act and having been approved and confirmed and adopted by this title. The authority of the city manager hereunder shall generally be to place and maintain stop signs, yield signs, semaphores and control devices upon streets and highways as may be proper and necessary to indicate and to carry out the provisions of the Vehicle Code of California, or prior or future local traffic ordinances and to regulate, warn or guide traffic.
F. 
For the purpose of meeting the changing conditions of traffic on the various streets within the city it is not deemed necessary or practical for the council to adopt an ordinance in every instance that a stop sign or other traffic sign is required. The council finds and determines, and so ordains, that the placing of such signs on the city streets is an administrative matter, not requiring the exercise of judicial or legislative functions by the council.
(Prior code § 3302)
No provision of the Vehicle Code, or of this code, 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.
A. 
The city manager is authorized and directed to post appropriate signs at the termini of each of the one-way driveways and at all entrances to Euclid Avenue, clearly denoting that each driveway is a one-way street, and denoting the direction that the traffic thereon must take. These signs shall be of a permanent nature and wholly or in part of the reflector type and all as generally required by the Vehicle Code in relation to signs and the posting thereof.
B. 
The city manager is fully authorized and empowered to open and improve crossways over and across the median strip at or near the middle of long blocks as he or she may from time to time be directed by motion or resolution of the city council, or at such other places as the city council may direct. Any and all such crossways shall thereupon become public streets or intersections.
C. 
The city manager is authorized and directed to post appropriate signs directing all persons desiring to lead, drive, or ride horses on the Euclid Avenue Parkway Bridle Path to use the oiled surface only and calling attention to the penalties for violation thereof.
D. 
1. 
The city manager is empowered and authorized to procure and place appropriate signs to regulate all vehicular traffic on the streets within the city bordering upon any of the public school grounds therein; such signs may be painted on the surface of the street or permanently posted or fixed as erect signs between the property line and curb line of the street, or movable signs may be utilized in front of such school grounds during the hours when the pupils are going to or from such buildings. Any and all of such signs shall bear appropriate cautionary words, signals or warnings and require that all vehicular traffic shall go slow or shall stop before proceeding if and when school children or other pedestrians are crossing the streets at such places.
2. 
Similarly, effective during certain hours as warranted by the traffic or pedestrian use, appropriate signs of warning and regulation may be placed at any street intersection commonly used in considerable numbers by school children on their way to and from such school buildings, or in any other instances where exceptional use of a street crossing, or crossings is made by pedestrians generally at certain hours and times. Ascertainment of the fact that there is such unusual use of any particular crossing by school children or other pedestrians at certain hours shall be sufficient to warrant and justify the placing of any such movable sign for the purpose of guiding traffic and the protection of pedestrians generally. It is made unlawful for the driver or operator of any such vehicle to fail or refuse to obey or to violate any such warnings, signals, signs or cautionary directions.
(Prior code § 3302.01)
The operator of any vehicle, train or animal shall obey the instructions of any official traffic-control device placed in accordance with this code, 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 § 3302.02)
A. 
The city manager 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 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 his or her determinations therefrom shall be made in accordance with those traffic engineering and safety standards and instructions set forth in the California Maintenance Manual issued by the Division of Highways of the State Department of Public Works.
C. 
Whenever the city manager 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 § 3302.03)
The city manager 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 § 3302.04)
The city manager is authorized to place and maintain distinctive roadway markings as described in the Vehicle Code 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. Such marking or signs and marking shall have the same effect as similar markings placed by the State Department of Public Works pursuant to provisions of the Vehicle Code.
(Prior code § 3302.05)
The city manager is authorized to remove, relocate or discontinue the operation of any traffic-control device not specifically required by the Vehicle Code or this title whenever he or she shall determine in any particular case that the conditions which warranted or required the installation no longer exist or pertain.
(Prior code § 3302.06)
The city manager 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 code.
(Prior code § 3302.07)
No person, unless authorized by this 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 the Upland Municipal Code or any resolution of this city pertaining thereto.
(Prior code § 3302.08)