What does it mean if a cyclist is signaling with their left arm outstretched?

When a cyclist extends their left arm outwards in a horizontal position, they are signaling their intention to make a left turn. This hand signal is a standardized gesture among cyclists and is recognized by all road users. It helps communicate to drivers and other cyclists that the cyclist plans to change direction to the left, promoting safer road sharing.

Understanding arm signals is crucial for both cyclists and motorists, as it contributes to overall safety on the road and allows for better anticipation of each other's movements. In contrast, the other options represent different signals or actions that a cyclist would use, such as signaling for a right turn or stopping, which are indicated by other specific arm positions.