For which purposes is a horn allowed to be used outside built-up areas?

In Germany, road users must adhere to specific regulations regarding the use of the horn outside built-up areas. The horn can be used primarily for safety purposes:

1. As a warning signal to alert other road users of potential danger.
2. As an overtaking signal to inform others that you are overtaking, ensuring visibility and safety on the road.

The third option, using the horn as a calling signal, is not permitted outside built-up areas. This regulation emphasizes the importance of using the horn solely for safety and communication in critical situations, to avoid noise pollution and distractions. Understanding these rules ensures safer driving practices and compliance with traffic regulations.