When must you signal when changing lanes?

Signaling at least 30 meters before changing lanes is essential for maintaining safe and predictable traffic flow. By using your turn signal in advance of the maneuver, you give other road users—such as drivers and pedestrians—ample time to react to your intentions. This advance notice helps prevent accidents by ensuring that those around you are aware that you are preparing to change lanes.

This practice not only enhances safety but also complies with traffic regulations, which often require signals to be used consistently and in a timely manner. Proper signaling allows for smoother transitions between lanes and contributes to safer driving conditions for everyone on the road.