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Theory Test: Safety Margins
Road Surfaces: being aware of different road surfaces and how they can affect the driving experience.
Skidding: how to prevent and deal with skidding whilst driving.
Weather Conditions: being aware how different weather conditions can affect driving and road safety.
Stopping Distances: knowing the distances required to stop a vehicle safely.
Again safety is the key theme. Add this to a fair dose of common sense and many of the questions answer themselves.
Facts to Know - Weather conditionsBraking distances on ice and in freezing conditions can be ten times the normal distance.
Overall stopping distances will be much longer when driving in wet conditions.
In windy conditions take extra care when passing cyclists and motorcyclists. Always allow them extra room.
After driving through flood water the first thing you should do is test your brakes. You should then go slowly while gently applying the brakes, as this will help to dry them.
In very hot weather the road surface can become soft. This can effect tyre grip and braking.
Side winds are most dangerous on an open stretch of road. When driving on a motorway with surface spray use dipped headlights.
When driving on snow or ice use the highest gear possible, as this helps avoid wheelspin.
When approaching a sharp bend in such conditions you should slow down and avoid sudden steering movements.
If your number plate, windows, lights or mirrors are covered in snow or ice you must clear them before staring a journey.
To correct a skid you should drive into it i.e. if the back of your vehicle slides to the right you should steer to the right.
Skidding is usually cause by driver error, driving too fast for the road conditions.
To control the speed of your car when driving down hill, select a low gear, as this makes use of the engine brake, and use the brakes carefully.
When parking facing downhill turn the wheels towards the kerb and put the handbrake firmly on.
You can tell you are driving on ice, and black ice, because your tyres make little noise and the steering becomes light.
To avoid a collision when entering a contraflow system you should switch to the correct lane in good time, reduce speed in good time and keep the correct separation distance.
When driving in fog use dipped headlights, allow more time for your journey, slow down.
When approaching a right-hand bend you should keep to the left as this will improve your view of the road ahead.
In wet conditions your car can aquaplane. This means the tyres have lifted off the surface of the road and are skating on the surface of the water. If your steering suddenly becomes very light, while driving on a wet road, this is a sign that your are aquaplaning. To correct it ease off the accelerator and allow the tyres to regain grip.
Anti-Lock Brakes Prevent the wheels from locking which means the tyres are less likely to skid.
Allow a vehicle to be steered whilst under braking.
May not work as effectively when the road surface is loose or wet.
In an emergency apply them rapidly and firmly.
They will start to work just as the wheels are about to lock.
Stopping DistancesBelow is a list of thinking (T), braking (B) and overall stopping distance (SD) - colour coded for easy reading - at a variety of speeds when the road surface is dry. If the road were wet the stopping distance would be twice the distance, on icy roads the stopping distance would be ten times as great.
6m (T) - 6m (B) = 12m
9m (T) - 14m (B) = 23m
12m (T) - 24m (B) = 36m
15m (T) - 38m (B) = 53m
18m (T) - 55m (B) = 73m
21m (T) - 75m (B) = 96m
DVSA Theory Questions - Safety Margins
Read the answers, knowledge and understanding. It will help you pass.
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