When should turn signals be used?

Answer: B — At least 100 feet before turning or changing lanes

Turn signals should be used at least 100 feet before turning or changing lanes to ensure that other drivers and pedestrians have enough time to react to your intentions on the road. This distance allows for proper communication of your actions, which is crucial for maintaining safety and preventing accidents. Using signals well in advance is a common practice that gives other road users ample notice, making it easier for them to anticipate your movements and adjust accordingly. The recommendation to signal at least 100 feet is designed to enhance visibility and predictability on the road, thereby promoting safe driving practices. Drivers should always signal, regardless of the presence of other vehicles, as it establishes a clear intention which contributes to a safer driving environment for everyone.