What is the correct hand signal for a left turn?

The correct hand signal for a left turn is to extend your left arm straight out. This signal clearly communicates to other drivers and pedestrians your intention to make a left turn. Using this arm position makes it visible to those around you who may not be able to see your vehicle's turn signals, especially in situations like heavy traffic or when visibility is limited.

The other options do not denote a left turn. Extending the left arm upward is a signal for a right turn, while extending the right arm straight out signals a left turn from a right-hand perspective; this can lead to confusion. Keeping your arms inside the vehicle does not communicate any intent at all and leaves other road users unaware of your actions. Clear communication on the road is essential for safety, making the use of proper hand signals vital for both your safety and that of others.