The answer options
- RainCorrect
- Strong winds
- Fog
- Nighttime driving
Why that is the answer
Rain reduces tyre grip on the road surface, which doubles your braking distance and increases your total stopping distance. The Highway Code recommends leaving at least double the standard gap—a four-second gap—in wet weather. While fog, nighttime driving, and strong winds create hazards by reducing visibility or affecting vehicle stability, they do not directly change the physical grip between your tyres and the road surface to lengthen braking distance.
How this comes up in the real test
Questions from safety margins appear throughout the 50-question multiple-choice section, and the wording changes between versions. Learn the rule rather than the sentence: the DVSA can ask the same point from the opposite direction, and a memorised answer falls over the moment the phrasing moves.
The pass mark is 43 out of 50, so seven wrong answers is your entire margin. If a whole category is shaky, run the topic practice below until you are getting every question right for the right reason, then go back to full mocks under the clock.
More safety margins questions
- As you approach a right-hand bend, you should keep well to the left. Why is this?
- How can the engine of your car be used as a brake?
- How can you avoid wheelspin when you’re driving on an icy road?
- How can you tell if your vehicle's tyres are losing their grip on a wet road surface?
- How should you make sure your brakes are working properly after passing through floodwater?
- In very hot weather the road surface can become soft. What will be affected by this?