Why is it dangerous to overtake on this snow-covered carriageway?

Your answer is correct, and here is why all three points are important in this situation:

1. Your vehicle may skid: On a snow-covered road, the tires have less grip. When overtaking, you might have to accelerate or steer more sharply. This increases the risk of losing control and skidding, which can lead to accidents.

2. Parts of the carriageway may be iced over: Snow can hide patches of ice underneath. Ice is much more slippery than snow, making it even harder to control the vehicle. You might not notice these icy patches in time while overtaking, which is especially dangerous.

3. Your vision may become even more negatively affected: When you overtake, you might move closer to the spray of snow kicked up by other vehicles, temporarily reducing your visibility. This makes it difficult to see other traffic or hazards, increasing the risk during the maneuver.

In summary, overtaking on a snow-covered carriageway is dangerous because the traction is reduced, hidden ice patches can surprise you, and your visibility can worsen, all increasing the risk of losing control or misjudging the traffic situation. This is why you should avoid overtaking under such conditions.