All signals given by hand and arm shall be given from the left side of the vehicle in the following manner, and the signals shall indicate as follows:
(A) Left turn. Hand and arm extended horizontally;
(B) Right turn. Hand and arm extended upward; except that, a person operating a bicycle may extend the right hand and arm horizontally and to the right side of the bicycle; and
(C) Stop or decrease of speed. Hand and arm extended downward.
(625 ILCS 5/11-806) Penalty, see § 71.999