Study topic
Anti-lock braking systems (ABS)
Most modern cars have anti-lock brakes (ABS). The theory test checks that you understand what ABS does, what it does not do, and how to brake when you have it.
Key facts to remember
- ◆ ABS stops the wheels from locking under heavy braking, helping you keep steering control.
- ◆ To use ABS in an emergency, apply firm, continuous pressure to the brake pedal.
- ◆ You may feel the pedal pulse or hear a noise -- this is normal; keep the pressure on.
- ◆ ABS does not necessarily shorten your overall stopping distance.
- ◆ ABS is far less effective on loose, wet or icy surfaces, so still drive to the conditions.
A warning light shows if there is a fault with the ABS; have it checked, as the brakes will still work but without the anti-lock function. ABS helps you steer round a hazard while braking hard, but it is no substitute for leaving a safe gap.