What is the proper hand signal for a left turn?

The proper hand signal for a left turn is when the left arm is extended straight out. This hand signal clearly communicates to other road users that the driver intends to make a left turn. Using hand signals is especially important when turn signals may not be functioning, ensuring that intentions are communicated effectively. Other options represent different signals: a left arm bent upward indicates a right turn, while a left arm bent downward typically signals a stop. The straight outward position of the arm directly corresponds with the intention to turn left, making it the universally recognized signal for this maneuver.