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Honk
Urgency Indicator
In traffic, honking can indicate urgency or impatience, signaling someone to move faster or pay attention. 
Cultural Variances
Honking customs differ world-wide. In some countries, honking is frequent and casual, while in others it's reserved for danger. 
Communicative Tool
Drivers sometimes use honks to communicate with other drivers, like saying 'hello' or 'thank you' on the road. 