During an urgent service, in which case is a priority vehicle obliged to use both light and sound signals simultaneously?

Question

DentroTest · Accepted Answer

Priority vehicles (such as ambulances, police, or fire trucks) must always warn of their presence when traveling on urgent service. The general rule establishes the joint use of the light signal (V-1, blue lights) and the acoustic signal (siren). However, the General Traffic Regulations allow omitting the acoustic signal and using only the light signal when omitting sound signals does not pose any danger to other users. Therefore, the simultaneous use of both is mandatory specifically when there is a risk or danger to other road users (for example, when crossing intersections with a red light or in heavy traffic).

During an urgent service, in which case is a priority vehicle obliged to use both light and sound signals simultaneously?

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