A. All signals herein required to be given by hand and arm shall be given from the left side of the vehicle in the following manner, and such signals shall indicate as follows:
(1) Left turn--hand and arm extended horizontally, with the hand open and the back of the hand to the rear.
(2) Right turn--hand and arm extended upward at an angle of forty-five degrees from shoulder or elbow, with the hand open and the back of the hand to the rear. A bicyclist may also extend the right hand and arm horizontally with the hand open and back of the hand to the rear.
(3) Stop or decrease speed--start--hand and arm extended downward at an angle of forty-five degrees from shoulder or elbow, with the hand open and the back of the hand to the rear.
(4) Pulling from curb or side of highway--same as for left turn.
B. A bicyclist is not required to continuously give the signals required by Subsection A of this Section if the hand or arm is needed to control the bicycle.