When is it necessary to use turn signals?

Using turn signals is essential for safe driving as it communicates your intentions to other road users. The correct answer highlights that turn signals should be used when changing lanes, turning, or merging. This practice helps prevent accidents by informing drivers and pedestrians of your actions well in advance. Proper signaling gives others time to react appropriately, enhancing overall road safety.

Additionally, while nighttime driving might feel like an appropriate time to signal, it's not exclusively necessary to only signal at this time, as signaling should occur regardless of lighting conditions. Similarly, signaling only when changing lanes omits crucial situations like turning or merging, which are equally important for safe navigation. Lastly, relying on personal judgment about when it feels appropriate to signal can lead to inconsistencies in communication with other drivers, which can compromise safety on the road.