What is the proper hand signal for a left turn?

The proper hand signal for a left turn is indicated by extending the left arm straight out horizontally. This signaling method is standardized for drivers to communicate their intentions to others on the road, ensuring safety and clarity while driving. By extending the arm out to the side, it clearly indicates that the driver intends to make a left turn, allowing other vehicles and pedestrians to anticipate the movement.

The other options represent different hand signals that are designated for various driving maneuvers. For example, a left arm bent upwards signals a right turn, while a left arm bent downwards indicates a stop or slow down. An extended right arm is used to signal a right turn, which is not applicable for indicating a left turn. Understanding these hand signals is crucial for safe driving and ensuring effective communication with other road users.