What is the proper hand signal for making a left turn while cycling?

The proper hand signal for making a left turn while cycling is to extend the left arm straight out. This signal is widely recognized and provides clear communication to drivers and other cyclists about the intention to turn left. Extending the left arm horizontally signals that the cyclist is preparing to change direction to the left, allowing others on the roadway to anticipate the movement. Using this hand signal promotes safety by ensuring that other road users are aware of the cyclist's actions, which is especially important in busy traffic situations.

It's also essential to point out that using the right arm to signal or bending the arm at a right angle does not conform to standard hand signaling practices for a left turn. Many cyclists may also mistakenly think that waving both arms above the head serves as a signal, but this gesture does not convey a clear directional intention and could confuse other road users. Thus, extending the left arm straight out is the standardized and effective method for communicating a left turn while cycling.