A. Stop Or Turn Signals: Any stop or turn signal when required herein shall be given either by means of the hand and arm or by a signal lamp or lamps or mechanical signal device, but when a vehicle is so constructed or loaded that a hand and arm signal would not be visible both to the front and rear of such vehicle, then said signals must be given by such a lamp or lamps or signal device. (1960 Code, Sec. 7-804)
B. Method Of Giving Hand And Arm Signals: All signals herein required 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.
2. Right turn: Hand and arm extended upward.
3. Stop or decrease speed: Hand and arm extended downward. (1960 Code, Sec. 7-805)