Highway Code: Hazard Adaptation
Rules 226-237: Adverse Weather | Free DVSA Theory Practice Test
Master Car Control, Visibility Adjustments & Wet/Icy Brake Distances
Test Coverage
Rules 226–237 of The Highway Code
Core Focus
Reduced traction, gale control & fog lights
Key Value
Essential skills for preventing loss of control
💡 Environmental Hazard Blueprint:
This section evaluates your capacity to mitigate risk during reduced visibility and dynamic climate shifts. Adjusting speed limits and safe spacing thresholds is vital under these rules:
🌧️ 2x Wet stopping distance
🧊 10x Icy brake extension
🌫️ Fog light rules (<100m)
🔥 Heat & engine management
- Questions are based on the ‘Driving in Adverse Weather Conditions’ section (Rules 226–237) of The Highway Code.
- Topics include driving in rain, snow, fog, strong winds, icy conditions, and extreme heat.
- This section is essential for learning how to adjust your driving to stay safe in different weather conditions.
- Covers real-life scenarios like skidding, reduced visibility, longer stopping distances, and overheating vehicles.
How would you safely handle your vehicle when driving through an area with strong crosswinds?
Steer sharply in the opposite direction of the wind
Speed up to minimize the time spent in the windy area
Firmly grip the steering wheel and reduce speed gradually
Change lanes frequently to balance the vehicle movement
Strong winds can cause sudden shifts in vehicle stability. Slowing down and maintaining control prevents abrupt movements that could lead to loss of control, especially on open roads or bridges. Highway Code Rule 232: Windy weather affects all road users, particularly high-sided vehicles, motorcyclists, and cyclists. Adjust your driving to maintain stability and safety.
What should you consider when driving in icy or snowy weather, even if roads have been treated?
Drive at normal speeds since treated roads eliminate ice completely
Keep a safe distance as stopping distances can be significantly longer
Overtake salt-spreading vehicles quickly to avoid salt spray
Assume road conditions will remain consistent throughout your journey
Even on treated roads, ice patches can remain, making stopping distances up to ten times longer. Maintaining extra space reduces the risk of skidding or collisions. Highway Code Rule 230: Drive carefully in icy conditions and keep extra distance from vehicles ahead.
What is the key reason why stopping distances are significantly longer in wet weather?
Drivers hesitate more before braking
Water on the road reduces tyre grip
Cars naturally slow down in rain
Brake lights become less visible in wet conditions
Wet roads reduce friction between tyres and the surface, making it harder to stop quickly. This is why stopping distances in wet weather are at least double those on dry roads. Highway Code Rule 227: Reduced tyre grip in wet weather increases stopping distances, requiring drivers to plan ahead.
While navigating an icy road, how should you adjust your driving technique to minimize the risk of losing control on bends?
Speed up slightly to gain momentum before the bend
Brake sharply while turning to stay on course
Reduce speed before the bend and steer smoothly
Keep the steering rigid and apply the handbrake
Braking or accelerating on a bend can cause a skid. Slowing down beforehand and steering gently helps maintain traction and stability. Highway Code Rule 231: Avoid sudden actions and brake progressively before reaching bends to stay in control on icy roads.
If you are following another vehicle in wet conditions, what is the safest action to take?
Maintain the same following distance as in dry weather
Increase the gap to allow more time to react
Drive closer to avoid spray from other vehicles
Flash your headlights to warn the driver ahead
Wet weather makes stopping more difficult due to reduced tyre grip. Leaving extra space between vehicles allows for safer braking and reaction time. Highway Code Rule 227: Keeping a greater distance from the vehicle ahead improves visibility and reaction time.
Why is it important to reduce speed before entering an area of fog, even if the road ahead looks clear?
Fog can appear suddenly, reducing visibility and reaction time
Other vehicles may be using hazard lights, making it difficult to judge distance
Slowing down reduces the chance of fog affecting engine performance
Braking is more effective at lower speeds in foggy conditions
Fog patches can be unpredictable and drastically limit visibility. Slowing down before entering fog allows you to react safely to unexpected road conditions or hidden hazards. Highway Code Rule 234: Always prepare for drifting fog banks by checking mirrors and reducing speed, even if the road appears clear.
Under what circumstances must you legally turn off your fog lights?
When another vehicle approaches within 75 meters behind you
If you can read a road sign from a reasonable stopping distance
When the road ahead is illuminated by streetlights or other vehicles' headlights
If the visibility improves to more than 100 meters, making fog lights unnecessary
Fog lights should only be used when visibility is severely reduced. When it improves to more than 100 meters, keeping them on can dazzle other drivers and obscure brake lights, creating road hazards. Highway Code Rule 236: Using fog lights in clear conditions can endanger other road users and is a violation of traffic regulations.
What might happen if you travel in icy conditions without checking the weather forecast or carrying an emergency kit?
You may reach your destination faster due to fewer vehicles on the road
You risk getting stuck or stranded without essential supplies
Your vehicle will automatically adjust to the road conditions
Roads remain safe as long as you use high-speed routes
Icy conditions can cause road closures and accidents. Without an emergency kit, you may be unprepared for long delays or vehicle breakdowns. Highway Code Rule 228: Checking the forecast and carrying necessary supplies reduces the risks of winter travel.
Why is it especially important to use your windscreen wipers and demisters in foggy conditions?
It helps other road users notice your vehicle
They help clear fog from the road surface
They reduce the chance of fog forming inside the headlights
Fog causes condensation, which can impair visibility inside the vehicle
Fog increases moisture levels, leading to window condensation that obstructs visibility. Using windscreen wipers and demisters ensures a clear view, reducing the likelihood of missing obstacles, pedestrians, or other vehicles. Highway Code Rule 235: Use windscreen wipers and demisters to maintain a clear view in foggy weather.
How should you prepare for driving in icy or snowy weather to ensure safety?
Drive cautiously, allow extra time, and carry an emergency kit
Rely on main roads since they are always cleared first
Avoid using headlights to conserve battery power
Drive quickly to minimize exposure to cold weather
In winter conditions, it is essential to take precautions, including driving carefully and carrying necessary emergency supplies to handle unexpected delays or breakdowns. Highway Code Rule 228: Only travel in icy or snowy weather when essential, and always be well-prepared.
How can changing weather conditions impact vehicle control, and what should a driver do to maintain safety?
Bright sunlight improves visibility, reducing the need for sudden stops
Rain after a dry spell increases grip on the road, allowing for faster braking
High temperatures can soften the road, so drivers should reduce speed and avoid sudden braking
A well-ventilated car enhances braking efficiency on slippery roads
Extreme heat can make road surfaces softer, affecting braking efficiency. Additionally, rain on dry roads can create a slippery surface. Drivers should adjust their speed and avoid sudden movements to maintain control. Highway Code Rule 237: Be cautious of road conditions that may change due to weather and adjust driving behavior accordingly.
What step should you take when starting to drive on an icy road to prevent wheel spin?
Use the highest suitable gear and accelerate gently
Press the accelerator hard to get moving quickly
Shift into the lowest gear for more control
Turn the steering sharply to maintain direction
Using a high gear reduces torque, lowering the risk of wheel spin and ensuring better control on slippery roads. Highway Code Rule 231: To maintain control in icy conditions, accelerate gently and use the highest suitable gear to avoid wheel spin.
Whether or not your journey is short, why is it important to remove snow from your vehicle before driving?
Snow will automatically melt within minutes of driving
Leaving snow on the car helps insulate the engine in cold weather
Snow can fall onto the road and create hazards for other drivers
Removing snow is only necessary for long-distance travel
Snow left on a vehicle can dislodge and create road hazards, potentially obstructing visibility for other drivers. This can lead to accidents, particularly on fast-moving roads or in congested areas. Highway Code Rule 229: Always clear snow from your vehicle to prevent road hazards.
How could listening to travel bulletins help when driving in snowy or icy conditions?
It alerts drivers to areas where driving at high speed is encouraged.
It allows drivers to avoid legal restrictions on winter travel.
It helps reduce the impact of cold weather on a vehicle’s battery.
It provides real-time updates on weather and road conditions.
Travel bulletins and variable message signs give drivers crucial information about hazards ahead, helping them make safer route decisions and prepare for changing conditions. Highway Code Rule 230: Pay attention to travel updates for information on road conditions during winter weather.
While preparing your vehicle for a journey in snowy or icy conditions, what is one essential step you must take before setting off?
Ensure all windows, lights, and mirrors are clear of snow and ice
Only clear the front windscreen and leave the side windows as they are
Start driving slowly so the ice melts naturally
Leave snow on the roof since it will not affect your visibility
Ensuring all windows, lights, and mirrors are clear of snow and ice is crucial for maximum visibility. Obstructed views can lead to accidents, and falling snow may endanger other road users. Highway Code Rule 229: Before driving, clear all snow and ice from windows, mirrors, and lights for safe travel.
When approaching a junction in dense fog, what is the safest course of action?
Turn on full beam headlights to improve visibility
Proceed cautiously without stopping to avoid delaying other vehicles
Sound your horn repeatedly to alert oncoming drivers
Reduce speed, stop in the correct position, and listen for traffic
Visibility at junctions is severely reduced in fog. Stopping in the correct position and listening for traffic ensures safety by preventing accidents with vehicles that may not be easily seen. Highway Code Rule 235: Always stop and check carefully before moving at a junction with limited visibility.
How could wet weather impact vulnerable road users such as cyclists and pedestrians?
It forces them to move slower, making them easier to spot
Rain and spray can reduce their visibility and control
They are unaffected since they are not driving motor vehicles
They have priority over all motor vehicles in wet conditions
Wet weather makes it harder for cyclists and pedestrians to see and be seen. Slippery surfaces also increase the risk of losing balance or stopping suddenly. Highway Code Rule 227: Extra caution is needed around pedestrians, cyclists, and motorcyclists in wet conditions.
When driving in fog or severely reduced visibility, what is a crucial reason for following proper headlight and fog light usage?
To avoid dazzling oncoming drivers
To ensure visibility beyond 200 meters
To comply with traffic laws at all times
To make yourself visible to others and reduce collision risk
In low visibility conditions, using headlights ensures other road users can see you. Front or rear fog lights help, but they must be switched off when visibility improves to avoid dazzling others. Highway Code Rule 226: Proper lighting use prevents accidents and ensures compliance with regulations.
Why might overtaking a snowplough be dangerous during icy or snowy conditions?
Snowploughs throw snow to both sides, which can obstruct your view
Snowploughs increase road friction, making overtaking unnecessary
Snowploughs only clear one lane, leaving other lanes completely safe
Snowploughs automatically stop when a vehicle is detected behind them
Snowploughs can create visibility hazards and leave uncleared areas of the road. Overtaking is risky unless the lane you are moving into is clear and safe. Highway Code Rule 230: Be cautious around snowploughs as they may obstruct visibility with thrown snow.
How should you adjust your driving when following another vehicle in thick fog?
Maintain normal distance since speeds are lower
Increase the following distance to compensate for reduced visibility
Flash your headlights to ensure the driver ahead sees you
Rely on the vehicle’s rear lights to gauge distance
In fog, visibility is limited, and stopping distances increase. Keeping a greater following distance allows more reaction time in case the vehicle ahead slows down or stops suddenly, reducing collision risk. Highway Code Rule 235: Keep a safe distance behind the vehicle in front, as rear lights can create a false sense of security.
If your tyres make almost no noise while driving in snowy or icy conditions, what should you be aware of?
The road has better traction than usual
Your tyres have become more efficient in icy conditions
Your vehicle may have lost grip on the road surface
Ice improves braking performance, so you can drive as normal
A lack of tyre noise indicates that ice is preventing proper traction, which can lead to skidding. Adjust speed and braking accordingly. Highway Code Rule 231: When driving on ice, tyres produce very little noise, which is a sign of reduced grip and increased risk of sliding.
What is a common mistake drivers make when encountering patchy fog on a clear road?
Keeping fog lights on even after visibility improves
Slowing down significantly and using hazard lights
Assuming the road will remain clear and maintaining high speed
Stopping in the middle of the road to reassess conditions
Fog can be patchy, and suddenly driving into a thick bank at high speed increases crash risk. Staying alert and reducing speed allows drivers to react safely to sudden visibility changes. Highway Code Rule 235: Even if fog seems to clear, be cautious, as conditions can change quickly.
Imagine you are driving in heavy rain, and your steering suddenly feels unresponsive. What should you do to regain control safely?
Apply the brakes firmly to regain traction
Turn the steering wheel sharply to test grip
Ease off the accelerator and slow down gradually
Accelerate slightly to push through the water
In wet conditions, water can cause tyres to lose grip, making steering unresponsive. Reducing speed gradually without sudden movements helps regain control safely. Highway Code Rule 227: When roads are wet, tyres have less grip, and sudden actions can lead to skidding.
Why must your number plates and lights be cleared of snow and ice before driving?
To ensure they remain visible and comply with legal requirements
To prevent the engine from stalling in cold temperatures
To improve fuel efficiency in winter weather
To help reduce tyre wear on icy roads
Clear number plates help authorities identify vehicles if needed, while clean lights enhance visibility in low-light or poor weather conditions. Obstructed lights or plates may result in fines or accidents. Highway Code Rule 229: Always clear lights and number plates before setting off to remain compliant with legal regulations.
What should you do when following a motorcyclist who is overtaking a high-sided vehicle in very windy weather?
Flash your headlights to warn the motorcyclist of strong winds
Overtake both the motorcyclist and the high-sided vehicle quickly
Move closer to the motorcyclist to block the wind for them
Maintain a safe distance to allow them room to adjust to turbulence
Wind turbulence from large vehicles can destabilize motorcyclists. Keeping a safe distance allows them space to react and regain balance without added pressure from following vehicles. Highway Code Rule 233: Be aware that turbulence from large vehicles can impact motorcyclists, and give them extra room to maneuver safely.