What does one long and two short honks mean?

[MartinFitz]

One long and two short honks indicate the intention to overtake. One honk: A single honk represents a form of etiquette, serving as a greeting. It is soft, brief, and pleasant to hear. When encountering a narrow road where vehicles need to pass each other, drivers may use a single honk to politely acknowledge and thank each other. Two honks: Two honks indicate that a vehicle intends to overtake. All drivers should be mindful of this signal. Alternatively, continuous honking is used in areas with heavy pedestrian or bicycle traffic to alert them to be cautious or yield the right of way. Honking regulations: In many large and medium-sized cities, honking is strictly prohibited in urban areas to control noise pollution. Drivers must adhere to these regulations and avoid creating noise pollution.