單選題 · 選擇一個答案
When is using your vehicle horn appropriate?
以下哪種情況適合使用車輛喇叭？
Use your horn for reasonable traffic warnings, not anger, greetings or frightening horses.
喇叭只能作為合理交通警告，不能用來鬥氣、打招呼或驚嚇馬匹。
閱讀相關知識
A genuine traffic danger need not involve poor visibility, but the warning must not create unnecessary or excessive noise.
是否需要鳴笛取決於實際交通危險，不限於視線不佳；警告也應適度，不能製造不必要或過大噪聲。