Safety Margins

If a vehicle begins to understeer on a slippery corner because the front tyres have lost grip, increasing the steering angle will help the front tyres regain adhesion and guide the vehicle around the bend.

A car is travelling at $20\text{ mph}$ along an ungritted side street covered with packed ice and snow. In normal dry conditions, the average total stopping distance at $20\text{ mph}$ is $12\text{ metres}$. According to The Highway Code, stopping distances on icy surfaces can increase by up to ten times ($10\times$). By how many metres does the total stopping distance increase when stopping on ice compared to normal dry conditions at this speed?

While travelling at 30 mph on a clear, dry road, a driver suddenly spots an unexpected hazard ahead and must perform an emergency stop. Which factor will directly increase the vehicle's thinking distance?

While descending a steep slope towards a junction, a driver keeps the clutch pedal fully depressed over a prolonged distance to regulate the vehicle's progress. What primary hazard does this specific action introduce regarding vehicle control and stopping performance?

When driving in steady rain, The Highway Code requires you to increase your separation from the vehicle ahead to at least four seconds. How does this rule logically relate to the specific physical components that make up your overall stopping distance?

In a modern car fitted with electronic fuel injection, coasting in neutral or holding the clutch pedal fully depressed while decelerating consumes less fuel than remaining in gear with the accelerator fully released.

Taking over-the-counter medication that causes drowsiness increases a vehicle's thinking distance when responding to a hazard.

When moving off on a road surface covered in packed snow or ice, selecting second gear rather than first gear helps to reduce wheel spin and establish traction.

A motorist is driving towards a busy roundabout. Which factor will directly increase the distance the car travels before the driver reacts and presses the footbrake?

On a dry road surface, a car travelling at $50\text{ mph}$ ($80\text{ km/h}$) has a standard braking distance of $38\text{ metres}$. According to The Highway Code, wet road conditions reduce tyre grip and cause the braking distance to double. What is the expected braking distance, in metres, for this car on a wet road surface?

You are driving along an exposed bypass in severe weather conditions with sudden wind gusts and patches of fog. Ahead of you, a high-sided box van is swaying unpredictably across lane markings. What should you do to maintain safe margins?

When driving on an exposed road in severe gale conditions, maintaining a normal two-second following distance behind a high-sided vehicle is acceptable because the vehicle ahead blocks the crosswind and creates a stable buffer zone.

You are driving along an unlit dual carriageway at night when a thick bank of fog suddenly reduces your visibility to approximately 50 metres. What should you do to maintain safe driving margins and vehicle visibility?

You are travelling across an elevated river viaduct where patchy fog reduces visibility to less than 100 metres and strong crosswinds cause vehicle buffeting. Which TWO actions should you take to maintain safe margins?

A passenger car is travelling at a constant speed of $60\text{ mph}$ ($96\text{ km/h}$) on a dry, level tarmac road, where its standard braking distance is $55\text{ metres}$. Heavy rainfall subsequently coats the road surface with water, reducing tyre grip. According to The Highway Code, what is the vehicle's expected braking distance in metres under these wet road conditions?

When travelling down a steep gradient, a vehicle's braking distance will be significantly longer than when travelling on a level road at the same speed.

You are driving along a road sheltered by high buildings and dense hedgerows on a very windy day. What hazard should you prepare for as you drive past the end of the sheltered section into open countryside?

Changing down to a lower gear abruptly while travelling on a slippery road can cause the driven wheels to lose traction and trigger a skid.

A driver is travelling on a road where surface water has pooled after heavy rainfall. If the driver is forced to brake firmly from a speed of $40\text{ mph}$ ($64\text{ km/h}$), how will these wet road conditions affect the vehicle's braking distance compared to normal, dry tarmac?

You are accelerating smoothly away from a junction onto an icy road when the driven wheels suddenly lose traction, causing the rear of the car to slide sideways. What is the correct initial action to regain control of the vehicle?