No driver of a vehicle shall disobey the instructions of any official traffic-control device placed in accordance with the provisions of this chapter, unless at the time otherwise directed by a police officer.
It is unlawful for any person to leave the roadway and travel across private property to avoid an official traffic-control device.
No provision of this chapter for which signs are required shall be enforced against an alleged violator if at the time and place of the alleged violation an official sign is not in proper position and sufficiently legible to be seen by an ordinarily observant person. Whenever a particular section does not state that signs are required, such section shall be effective even though no signs are erected or in place.
A. 
Whenever any official traffic-control device is placed or held in position approximately conforming to the requirements of this chapter and purports to conform to the lawful requirements pertaining to such device, such device shall be presumed to have been so placed or held by the official act or direction of lawful authority, and comply with the requirements of this chapter, unless the contrary shall be established by competent evidence.
B. 
The driver of a vehicle approaching a traffic-control signal on which no signal light facing such vehicle is illuminated shall stop before entering the intersection in accordance with rules applicable in making a stop at a stop sign.
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Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. I).