What is the primary purpose of using turn signals?

The primary purpose of using turn signals is to communicate intentions to other drivers on the road. This communication is essential for maintaining safety and smooth traffic flow. When a driver activates their turn signal, it indicates to other motorists that they plan to make a turn or change lanes. This allows other drivers to adjust their speed and position accordingly, reducing the likelihood of collisions.

While other choices touch on relevant aspects of driving—such as alerting pedestrians and preventing merging—those functions are more secondary. Turn signals are specifically designed to convey a driver's intentions to fellow road users, making it a critical aspect of safe driving practices. Brightening the vehicle's rear lights, although important for visibility, serves a different purpose entirely and does not relate to the specific function of turn signals.