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:
I. Left turn-Hand and arm extended horizontally.

Terms Used In New Hampshire Revised Statutes 265:47


II. Right turn-Hand and arm extended upward. Or optionally, when on a bicycle, by extending the right hand and arm horizontally.
III. Stop or decrease speed-Hand and arm extended downward.