When are anti-lock brakes (ABS) most effective?
If you have ABS and need to stop in an emergency, keep your foot firmly on the brake pedal until the vehicle has stopped. When the ABS operates, you may hear a grating sound and feel vibration through the brake pedal. This is normal and you should maintain pressure on the brake pedal until the vehicle stops.
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An anti-lock braking system, often simply known as ABS braking, can stop your vehicle from skidding in the event of your wheels locking up when you depress the brake pedal.
It can reduce your stopping distance and allow you to retain a degree of steering.
ABS is triggered when it detects that one of your wheels has locked and begun to skid. It then pumps, or rapidly applies and releases, the brakes.
If your vehicle is fitted with anti-lock brakes, you should follow the advice given in the vehicle handbook. However, in the case of an emergency, apply the footbrake firmly; do not release the pressure until the vehicle has slowed to the desired speed. The ABS should ensure that steering control will be retained, but do not assume that a vehicle with ABS will stop in a shorter distance.
What is ABS and how does it work? – carwow.co.uk
Stopping distances made simple – rac.co.uk