What minimum section of the road ahead of the truck should be lit by properly-adjusted low-beam lights?
Show the correct answer
Correct answer
B. 40 m.
Explanation
In the photo you can see a lit headlamp of a lorry. Properly adjusted dipped headlights (low beam) should light the road ahead of the vehicle for at least 40 m - answer B.
The Regulation on the technical conditions of vehicles requires dipped headlights to light the road sufficiently for at least 40 m ahead of the vehicle in good visibility and, at the same time, not to dazzle other drivers. This explains the difference compared with main beam headlights, which must light at least 100 m (answer C) - they shine far, but you may use them only on unlit roads and when you will not dazzle anyone. The answer 30 m is the requirement for the dipped beam of a moped, not a lorry. Forty metres translates directly into speed: at 80 km/h the stopping distance is more than 60 m, so when you drive at night on dipped headlights only, you are driving faster than you can see - that is why on an unlit road after dusk it is worth using main beam, as long as you do not dazzle anyone.
Legal basis: Annex No. 6 to the Regulation on the technical conditions of vehicles and the scope of their necessary equipment; Art. 51 para. 1 and 3 of the Road Traffic Act (Prawo o ruchu drogowym)