In which situation is it most appropriate to use turn signals?

Using turn signals is essential for indicating your intentions to other road users, ensuring safety and promoting better communication on the road. The correct choice emphasizes that the most appropriate situation to use turn signals is when changing lanes or turning. This is crucial because it alerts other drivers and pedestrians of your actions, helping to prevent collisions and misunderstandings.

When you signal during these maneuvers, you provide clear information about your intended direction, allowing others to anticipate your movements and react accordingly. This practice is a fundamental aspect of driving etiquette and is often mandated by traffic laws.

While there may be instances where using turn signals can be beneficial in other scenarios, such as when parking or in heavy traffic, the primary purpose of turn signals is to communicate specific changes in direction or lane position. Therefore, utilizing them consistently when turning or changing lanes upholds the safety of all road users.