What is the proper hand signal for a left turn?

The proper hand signal for a left turn is indicated by positioning the left arm straight and parallel to the ground, which is represented by the second option. This signaling method is widely recognized and provides clear communication to other road users that the driver intends to make a left turn. By maintaining the arm straight in a horizontal position, it ensures maximum visibility and minimizes confusion among other drivers and pedestrians.

The other options do not convey the intended action of turning left effectively. A bent arm at the elbow could suggest different maneuvers depending on the direction it is bent. An upward bent arm typically indicates a right turn or a stop when the arm is lifted, while a right arm signal is used specifically for signaling a right turn and doesn't apply to left turns. Understanding these hand signals is crucial for maintaining safety and clear communication on the road, especially in situations where vehicle indicators might not be visible.