28-756. Method of giving hand and arm signals A. Except as provided by subsection B, a person shall give all hand and arm signals required by this article from the left side of the vehicle in the following manner, and the signals shall indicate as follows: 1. Left turn. Hand and arm extended horizontally. 2. Right turn. Hand and arm extended upward. 3. Stop or decrease speed. Hand and arm extended downward. B. A person operating a bicycle may give a right turn signal by extending the right hand and arm horizontally to the right side of the bicycle.
Arizona Legal Code