In which of the following cases are you required to give short horn blasts while driving a bus in the fog?
Show the correct answer
Correct answer
B. While overtaking outside a built-up area.
Explanation
In the photo you can see a country road in thick fog and a car at the left edge of the roadway. In fog, you must give short horn signals while overtaking outside a built-up area - answer B.
The Road Traffic Act requires the driver of a power-driven vehicle, in conditions of reduced visibility, to switch on dipped headlights or front fog lights, and outside a built-up area, in fog, to give short horn signals while overtaking or going around a vehicle or obstacle. So the duty applies only to driving outside a built-up area - in a built-up area (answers A and C) you must not use the horn at all, unless there is immediate danger. A short sound of the horn warns the driver of the vehicle being overtaken, who in fog may not notice the bus in the mirror. Limit overtaking in fog itself to situations when it is really necessary.
Legal basis: Art. 30 para. 1 point 1 letter b and Art. 29 para. 2 point 2 of the Road Traffic Act (Prawo o ruchu drogowym)