In an insufficiently lit tunnel, which lights must you have switched on if you are travelling at 80 km/h?

Correct answer

The main beam headlights, provided you do not dazzle other road users.

In a tunnel that is not sufficiently lit, it is important to use the appropriate lights to ensure both your own visibility and the safety of other road users. If you are travelling at a speed of 80 km/h, you must use the main beam headlights (also known as full beam). These lights provide more intense and extensive illumination, which is crucial for visibility in low-light conditions, such as in a tunnel. However, it is essential to make sure you do not dazzle other drivers. That's why, if there are other vehicles coming in the opposite direction or ahead of you, you must switch to dipped headlights (low beam) to avoid causing inconvenience or risk through dazzling. This is especially relevant in a tunnel, where the confined space can amplify the dazzling effect caused by main beam headlights.