When visibility on the road is poor, the driver should:
- Correct answer: Slow down, adjust his speed to the visibility conditions and turn-on his dipped beam.
- On a two-way road – slow down; and on a one-way road – continue driving normally.
- Accelerate and turn-on the rear lights, to prevent collision with the vehicle driving behind.
- Turn-on the high beam to extend the field of vision and warn the incoming traffic from your opposite direction.
Why this is the answer
The correct answer in the official bank: Slow down, adjust his speed to the visibility conditions and turn-on his dipped beam.
In fog, rain or dust you must slow down and match your speed to how far you can see, so you can always stop in time. Dipped beams help you see and, above all, make you visible to others. High beams are wrong here, because they reflect off fog or rain, dazzle you and blind oncoming drivers. The rule applies on every road, including one-way roads.