When is it appropriate to use your horn?

Using your horn to alert other drivers or pedestrians of your presence in a dangerous situation is appropriate because it serves as a safety measure. The primary purpose of a vehicle horn is to communicate with others on the road, especially when there is a potential hazard that could lead to an accident. For instance, if a driver is approaching a crosswalk where a pedestrian is present, using the horn can help ensure that both the pedestrian and other drivers are aware of the situation, preventing possible collisions.

In contrast, expressing frustration at another driver does not contribute to road safety and can escalate tensions between drivers, leading to dangerous situations. Using the horn only at stop signs or when making a lane change would also not be advisable, as these scenarios do not necessarily require alerting others unless there is an immediate risk involved. Thus, the use of the horn should be reserved for situations where it can effectively prevent incidents and enhance overall road safety.