AG
Written / reviewed by UK driving instructor and founder of New Driver Hub
This guide is written and reviewed for UK learner driver theory preparation, with practical insight from real learner-driver training.
Last reviewed: May 2026 Built around UK learner driver theory preparation
What this topic is really testing The test wants you to choose the safer speed and bigger gap when rain, ice, fog, spray, wind or darkness makes the road harder to read.
Rain At least double stopping distance
Ice Up to ten times further
Fog Use dipped headlights
👨🏫 Instructor insight
What I see learners get wrong in lessons Bad-weather questions test whether the learner understands how conditions change the risk, not just whether they know it is raining or foggy.
Following distance should increase when the road is wet, icy or visibility is reduced. Smooth inputs help prevent skids: avoid harsh braking, steering or acceleration. Fog, spray and low sun can make a hazard harder to see even when the speed limit has not changed. Top 10 theory tips: Weather & Road Conditions Know that you must reduce speed and increase following distance in rain, fog, snow, or ice. Remember the 2-second rule becomes at least 4 seconds in wet conditions and much more in snow or ice. Understand what aquaplaning is and what to do if it happens (ease off accelerator, do not brake or steer sharply). Know the rules for using fog lights: only when visibility is seriously reduced (less than 100 metres). Remember that you must clear all windows and mirrors of ice or snow before driving. Know that strong winds can affect high-sided vehicles and you should give them extra space. Understand that you should never drive through flood water - find another route. Know how night driving changes what you can see and why you must dip headlights for oncoming traffic. In theory questions you will often be asked how weather affects stopping distance, visibility, or what action to take. Weather and road condition rules exist because grip, visibility, and stopping distances change dramatically in bad weather. Theory-test study guidance - use these alongside the official Highway Code and plenty of practice questions.
Rain and wet roads Wet roads reduce grip and make stopping take longer. Leave more space, slow down and watch for spray from large vehicles.
Ice and snow On ice, stopping distances can be far longer. Pull away gently, steer smoothly and avoid harsh braking or acceleration.
Fog and poor visibility Use dipped headlights in poor visibility and fog lights only when visibility is seriously reduced. Switch fog lights off when conditions improve.
How far should you leave in wet weather?
At least double the normal following distance.
When should fog lights be used?
Only when visibility is seriously reduced, and they should be switched off when visibility improves.
