What is the main function of Anti-lock braking systems (ABS)?

The primary function of Anti-lock Braking Systems (ABS) is to prevent wheel lock during braking. When a driver applies the brakes, particularly in slippery conditions, there's a risk that the wheels will lock up, which can lead to a loss of traction and control. ABS allows the driver to maintain steering control by modulating brake pressure, thereby preventing the wheels from completely locking.

However, while ABS is effective at maintaining control and preventing skidding, it does not necessarily shorten the vehicle's stopping distance in all situations. For instance, on certain surfaces like gravel or snow, the increased stopping distance can occur because the system allows for minimal wheel slip to maintain traction. Thus, it's important to note that while ABS helps in maintaining vehicle control, it doesn’t guarantee shorter stopping distances in every scenario. This distinction is crucial for understanding the limitations of ABS technology and using it correctly while driving.