You should honk your horn when you:

Have lost control of your car.
Have to stop quickly.
Are passing a bicyclist.
All of the above.
Explanation

A horn should be used only in situations that require immediate attention. When you lose control of your vehicle, it can be challenging for other drivers to anticipate your movements, which can result in accidents. Your horn instantly attracts the attention of other road users. Use it to warn other drivers or pedestrians of a potentially dangerous situation, or when you think another driver or a pedestrian does not see you.

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