How Anti-Lock Braking Systems (ABS) Keep You in Control
Last reviewed: 2026 · Driviology Road Safety Education Team
Quick Answer
An anti-lock braking system (ABS) rapidly pulses the brakes to prevent the wheels from locking up during hard braking, which lets you keep steering control instead of skidding straight ahead.
ABS is standard equipment on virtually all modern vehicles, and understanding how it works — and how to brake when it activates — can make a real difference in an emergency stop.
How ABS Works
Sensors at each wheel detect when a wheel is about to lock up under hard braking. The system rapidly releases and reapplies brake pressure to that wheel, many times per second, keeping the tire rolling rather than skidding.
Why This Matters for Steering
A locked, skidding tire cannot generate steering force, meaning the vehicle will travel in a straight line regardless of how the steering wheel is turned. ABS keeps the tires rolling just enough that you retain the ability to steer around an obstacle while braking hard.
How to Brake When ABS Activates
Press the brake pedal firmly and hold it down — do not pump the brakes, which is the correct technique only for older, non-ABS vehicles. You may feel a pulsing sensation in the pedal; that is the system working correctly.