What is the main purpose of anti-lock braking systems (ABS)?

The main purpose of anti-lock braking systems (ABS) is to prevent the wheels from locking up during hard braking, which helps maintain steering control. When a driver applies the brakes suddenly and forcefully, traditional braking systems can cause the wheels to stop rotating, leading to a loss of traction and control. This can result in skidding, making it difficult for the driver to steer the vehicle. ABS works by automatically modulating brake pressure to prevent the wheels from locking, allowing the driver to maintain steering ability even while braking hard.

This system is particularly valuable in slippery conditions, such as rain or snow, where the risk of losing traction is higher. By maintaining the ability to steer, ABS aims to help drivers avoid obstacles and reduce the likelihood of accidents. The other options discuss benefits or outcomes that are not the main function of ABS, such as decreasing stopping distance or improving fuel efficiency, which are not directly related to the primary role of this braking system.