Which of the following measures may improve safety while driving a truck in fog?
Show the correct answer
Correct answer
B. Keeping a safe distance from the preceding vehicle.
Explanation
In the photo, you are driving a lorry in thick fog on a road outside town, and another lorry is coming from the opposite direction. Keeping a greater following distance from the vehicle in front will improve safety - answer B.
The Road Traffic Act requires you, in reduced visibility, to exercise particular caution and switch on dipped headlights or front fog lights, and outside a built-up area in fog to give short horn signals when overtaking and when going around other vehicles or obstacles; separately, it requires you to keep the distance needed to avoid a collision if the vehicle in front brakes. In fog you see only as far as your lights reach, so the following distance must be greater than usual - it is the only thing that gives you time to react. Main beam (answer A) reflects off water droplets and creates a white wall, making visibility worse. Rear fog lights may be switched on only when visibility drops below 50 m, and when it improves they must be switched off without delay, because they dazzle drivers behind.
Legal basis: Art. 30 para. 1 and 3 and Art. 19 para. 2 point 3 of the Road Traffic Act (Prawo o ruchu drogowym)