Safety Margins
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Safety Margins
What does it mean if the Electronic Stability Control (ESC) indicator light comes on briefly while you’re driving?
ESC is a computer controlled technology that detects reduced traction and automatically makes corrective adjustments to prevent loss of control. The ESC light comes on briefly to alert the driver that the system has activated and the car is approaching its handling limits. It’s a powerful driver aid but it cannot save a car once its traction limits have been exceeded.
Safety Margins
How much can stopping distances increase in icy conditions?
Tyre grip is greatly reduced in icy conditions. For this reason, you need to allow up to 10 times the stopping distance you would allow on dry roads.
Safety Margins
What's the main cause of skidding?
Skidding is usually caused by driver error. You should always adjust your driving to take account of the road and weather conditions.
Safety Margins
What would suggest you're driving on an icy road?
Drive extremely carefully when the roads are icy. When travelling on ice, tyres make virtually no noise and the steering feels light and unresponsive. In icy conditions, be very gentle when braking, accelerating and steering.
Safety Margins
What will be affected if the road surface becomes soft in very hot weather?
If the road surface becomes very hot, it can soften. Tyres are unable to grip a soft surface as well as they can a firm dry one. Take care when cornering and braking.
Safety Margins
In which conditions will your overall stopping distance increase?
Extra care should be taken in wet weather. On wet roads, your stopping distance could be double that in dry conditions.
Safety Margins
You're driving on an open road in dry weather. What distance should you keep from the vehicle in front?
One way of checking there's a safe distance between you and the vehicle in front is to use the two-second rule. To check for a two-second time gap, choose a stationary object ahead, such as a bridge or road sign. When the car in front passes the object, say 'Only a fool breaks the two-second rule'. If you reach the object before you finish saying the phrase, you're too close and need to increase the gap.
Safety Margins
What will help you to move off on a snowy surface?
If you attempt to move off in a low gear, there'll be more torque (turning force) at the driven wheels than if you use a higher gear. More torque makes it easier for the tyres to lose grip and so spin the wheels.
Safety Margins
What's the main benefit of driving a four-wheel-drive vehicle?
By driving all 4 wheels, the vehicle has maximum grip on the road. This grip is especially helpful when travelling on slippery or uneven surfaces. However, having four-wheel drive does not replace the skills you need to drive safely.
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This product includes the Driver and Vehicle Standards Agency (DVSA) revision question bank.