When is it illegal to use your horn?

Using your horn in a manner that startles or annoys others unnecessarily is indeed illegal. The primary purpose of a car horn is to alert other drivers and pedestrians of your presence or to warn of potential danger. However, if the horn is used indiscriminately or excessively, it can lead to distractions or escalate tensions, especially in situations where no danger is present. This regulation exists to maintain public peace and safety, ensuring that the honking of horns is reserved for genuine traffic situations rather than being a tool for expressing frustration or impatience.

In contrast, the other options, while potentially disruptive, do not specifically constitute illegal horn use in most contexts. For example, using the horn when pedestrians are crossing can be appropriate if a driver needs to alert them to a vehicle’s presence. Similarly, using the horn in heavy traffic might be acceptable if it serves a safety purpose. In residential areas at night, while more cautious use is encouraged to avoid disturbing residents, it’s not universally illegal to honk. Understanding these nuances helps ensure that horn use remains a tool for safety rather than annoyance.