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.
Structure Delaware Code
Subchapter VI. Turning and Starting and Signals on Stopping and Turning
§ 4152. Required position and method of turning at intersections.
§ 4153. Limitations on turning around.
§ 4154. Starting parked vehicles.
§ 4155. Turning movements and required signals.