Priority vehicles travelling on an urgent mission will indicate their presence...
Signage: General rules
Explanation
**Priority vehicles** such as police cars, fire trucks, ambulances, and civil protection vehicles, when on an **urgent service**, must clearly signal their presence so that other drivers and pedestrians yield the right of way.
- These vehicles use a **blue light signal** and an **acoustic signal** (siren) **simultaneously**.
- The combination of both signals ensures that their presence is noticeable both visually and audibly, which is crucial for them to move quickly and without obstacles in emergency situations.
Therefore, the simultaneous use of the light signal and the acoustic signal is the correct way to signal their presence during an urgent service.
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