The arm signal to turn left is to extend the left arm straight out of the window with the palm facing forward. This hand signal is used to indicate to other drivers and road users that you intend to make a left turn.
Details on Left Turn Arm Signal
- Extend your left arm straight out the driver's side window.
- Keep your arm straight with the palm facing forward.
- This signal should be given before making the turn and kept visible until you actually begin the turn.
- It is the standard hand signal used especially if vehicle turn signals are not working or as an additional means of communication.
This is the commonly taught and recognized hand signal for indicating a left turn in driving practice and driver's education.
Note that some sources for bicycles and older vehicles might show slightly different signals. However, for standard automotive driving, extending the left arm straight out is the correct and widely accepted left turn signal.