Which hand signal indicates a left turn?

The hand signal that indicates a left turn is shown by extending the left arm straight out. This is a widely recognized signal used by drivers to communicate their intent to turn left to other road users. By extending the arm horizontally to the left, it clearly conveys that the driver plans to make a left turn, enhancing safety on the road by informing others of their actions.

The other signals mentioned signify different maneuvers. For example, a bent upward arm indicates a right turn, while an arm extended straight out to the right indicates a right turn as well. Raising both arms is not a standard signal for any turning direction but could lead to confusion on the road. Therefore, knowing the correct hand signals is vital for effective communication while driving.