(A) 
No driver of any vehicle shall disobey the instructions of any traffic signs, signals, markers, barriers or parking meters placed in accordance with the Oregon Vehicle Code or Chapters 10.05 through 10.50 CMC, including those erected by any authorized public utility and department of this city or other authorized person, unless it is necessary to avoid conflict with other traffic or otherwise directed by a police officer.
(B) 
No unauthorized person shall move, remove or alter the position of, or deface, or tamper with any such signs, signals, markers, barriers, parking meters or fine boxes.
(Code 2000 § 7.045)
When stop signs are erected at or near the entrance to any intersection, every driver of a vehicle approaching such sign shall come to a full stop before entering any crosswalk or intersection except when directed to proceed by a police officer or traffic control signal.
(Code 2000 § 7.050)
No driver shall enter an intersection or a marked crosswalk unless there is sufficient space on the opposite side of the intersection or crosswalk to accommodate the vehicle he is operating without obstructing the passage of other vehicles or pedestrians, notwithstanding any traffic control signal indication to proceed.
(Code 2000 § 7.055)
It shall be unlawful for any person to letter, mark, or paint in any manner any letters, marks, or signs on any sidewalk, curb, street or alley, or to post on a parking strip anything designed or intended to prohibit or restrict parking in front of any sidewalk, dwelling house, business house, or in any alley except in compliance with Chapters 10.05 through 10.50 CMC.
(Code 2000 § 7.060)