A traffic light changes from red to green. Is it permitted to use the horn to warn another driver that they can go now?
Signage: Traffic lights
Explanation
The use of the **horn** is regulated and is only allowed in specific situations. It cannot be used to warn another driver that the traffic light has changed from red to green. The situations in which the use of the horn is permitted are:
- **Avoiding an accident**: If there is an imminent risk of collision, the horn can be used to alert other drivers.
- **Overtaking on interurban roads**: On roads outside urban areas, the horn can be used to notify another driver that you are going to overtake.
- **Priority services**: If an emergency service is being carried out, such as taking a seriously injured person to the hospital, the horn can be used to request passage.
In summary, the horn should not be used simply to indicate that a traffic light has changed to green, as this does not fall under any of the permitted situations.
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