When is it necessary to use your horn while driving?

Answer: B — To warn another driver of an impending collision

Using your horn to warn another driver of an impending collision is a critical safety measure. In situations where another vehicle may not see you or is making a maneuver that could lead to a crash, a horn can serve as an important auditory cue to alert them to your presence and intentions. This action helps to prevent accidents and ensures the safety of everyone on the road. While alerting pedestrians can be a consideration, horns are primarily meant for alerting other drivers and are typically not relied upon for pedestrians, who should be aware of their surroundings. Expressing frustration through the horn is discouraged as it can lead to road rage and does not contribute to safety. Additionally, the notion that the horn should only be used during night driving is incorrect; it is a key tool at all times when necessary to avoid dangerous situations.