Why is it important to use turn signals when changing lanes?

Using turn signals when changing lanes is crucial because it alerts other drivers of your intentions. This communication is essential for maintaining safety on the road. When you signal, other drivers are made aware that you are preparing to change lanes, which allows them to adjust their speed and position accordingly. This awareness reduces the risk of collisions and enhances the overall flow of traffic.

The other answer choices do not address the primary reason for using turn signals. Activating a vehicle's GPS does not relate to lane changes, compliance with vehicle inspection laws is a separate regulatory requirement, and avoiding speeding fines is unrelated to signaling intentions. Signal usage is fundamentally about clear communication among road users to facilitate safe driving practices.