An ambulance is equipped with optical (flashing light) and acoustic (siren) signalling. Their use is determined by law and may only be used in the interests of the health of the patient.
- A1 urgency: Always with flashing lights and siren.
- A2 urgency: It is not standard to use the flashing lights and siren. After making a diagnosis, the paramedic may decide to do so
- B urgency: no flashing lights and siren.