Anti-Lock Brake System (ABS)- Page 185

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Let’s say the road is wet and you’re driving safely.
Suddenly, an animal jumps out in front of you. 
You slam on the brakes and continue braking. 
Here’s what happens with ABS:

A computer senses that wheels are slowing down. 
If one of the wheels is about to stop rolling, the
computer will separately work the brakes at each wheel.

The anti

-

lock system can change the brake 

pressure faster than any driver could. The computer 
is programmed to make the most of available tire and
road conditions. This can help you steer around the
obstacle while braking hard.

As you brake, your computer keeps receiving updates on
wheel speed and controls braking pressure accordingly.