When going through a tunnel that has sufficient lighting, is it mandatory to turn on the vehicle's lights?

Question

DentroTest · Accepted Answer

According to the General Traffic Regulations, every vehicle traveling through tunnels, underpasses and sections affected by the “Tunnel” sign (S-5) must have its lights on at any time of day (Article 98(1)). If the tunnel is sufficiently lit, the position lights and the low beam must be on (Articles 99(1) and 101(1)). The purpose is not only to improve the driver's vision, but to ensure that the vehicle is seen in time by others in the face of sudden changes in brightness. Therefore, saying that it is not necessary because artificial light is enough is incorrect, and so is saying that they only have to be turned on when a sign or an illuminated panel requires it: the obligation arises from traveling through the tunnel, underpass or equivalent section, signed with the S-5, and not from a specific order.

When going through a tunnel that has sufficient lighting, is it mandatory to turn on the vehicle's lights?

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