What is the primary reason for using turn signals?

Using turn signals is primarily about ensuring safety and communication on the road. When a driver uses turn signals, it signals their intent to change direction or lanes to other drivers, pedestrians, and cyclists. This communication helps to prevent accidents by providing explicit warnings about upcoming actions. When others are aware of a driver's intentions, it creates a more predictable traffic environment, allowing all road users to coexist safely.

The other options do not accurately reflect the main purpose of turn signals. While turn signals may fulfill legal requirements and have an indirect impact on fuel efficiency by facilitating smoother traffic flow, those are secondary to the fundamental goal of enhancing safety through effective communication. Confusing other drivers would obviously be counterproductive and contrary to the very purpose of using turn signals. Therefore, the correct answer highlights the essential role that turn signals play in notifying others and promoting safe driving practices.