A. Signs. The City Engineer shall determine and designate the size, shape and character of all official warning, regulatory and direction signs, other than signs the size, shape and character of which have been established by the State Department of Transportation pursuant to the Vehicle Code.
1. Violation. No provision of this Title for which signs are required, shall be enforced against an alleged violator thereof, unless appropriate signs are in place and sufficiently legible to be seen by an ordinarily observant person, giving notice of such provision.
B. Authorization and Placing of Signals.
1. The City Council shall by resolution designate, upon the basis of a traffic engineering investigation, what intersections shall be controlled by official traffic control signals.
2. Whenever the City Council finds, upon the basis of a traffic engineering investigation, that the conditions, for which traffic control signals have been placed at an intersection pursuant to Subsection B.1. of this Section no longer exist, the City Council shall by resolution direct that such traffic control signals be removed.
3. The City Engineer is authorized to place, maintain, operate or remove, or cause to be placed, maintained, operated or removed, all official traffic control signals authorized by the City Council as herein provided. Such official traffic signals shall conform to the provisions of the Vehicle Code.
C. Hours of Operation. The City Engineer is authorized to determine, upon the basis of a traffic engineering investigation, 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 Title or established by resolution of the City Council.
D. Installation by City Engineer.
1. The City Engineer may place and maintain such traffic control devices in addition to those authorized by other provisions of this Title as may be necessary to regulate, guide or warn traffic; but the City Engineer shall make such determination upon the basis of traffic engineering principles and traffic investigations and in accordance with such standards, limitations and rules as may be established by ordinance or resolution of the City Council.
2. Whenever the City Engineer finds, upon the basis of a traffic engineering investigation, that the conditions, for which such traffic control devices have been installed as provided in Subsection D.1. of this Section no longer exist, the City Engineer shall remove such traffic control devices.
E. Traffic Markings.
1. The City Engineer is authorized to place, upon the basis of a traffic engineering investigation, traffic guide lines, dividing highways into the number of traffic lanes that are proper and necessary, and may place such other pavement markings as are necessary to direct vehicular movements in accordance with requirements of this Title and the Vehicle Code.
2. Whenever the City Engineer finds, upon the basis of a traffic engineering investigation, that the conditions for which traffic guide lines or other markings were placed as provided in Subsection E.1. of this Section no longer exist, the City Engineer shall remove such traffic guide lines or such markings.
F. Temporary Removal. Whenever, because of the construction, alteration, repair or improvement of any highway, or because of other emergency, compliance with any prohibition of this Title, including a prohibition pursuant to any action of the City Council taken in accordance with this Title, will create a traffic hazard and the City Engineer so finds, he is authorized to either remove or cover up any traffic control device which informs persons of such prohibition. While such traffic control device is removed or covered, the effect of such prohibition is suspended. At the end of such emergency, unless otherwise determined by the City Council, the City Engineer shall replace or uncover such traffic control device.