**Triangular traffic signs** are important for road safety, as their main function is to **warn of a danger** on the road. These signs are part of the **vertical danger signs**, which are used to alert drivers about situations that could pose a risk, such as roadworks.

- Triangular signs with a yellow background are common in construction zones, indicating that caution should be exercised and specific local rules should be followed.
- Additionally, in construction situations, other devices such as **permanent direction panels** are used, which also warn about the level of danger in the area. For example, one panel indicates moderate danger, while three panels indicate high danger.

Therefore, triangular signs are essential for alerting drivers to potential hazards on the road, helping to prevent accidents and maintain road safety.