What does RWAL (Rear-Wheel Anti-Lock) help vehicles maintain?

The correct answer highlights that RWAL (Rear-Wheel Anti-Lock) primarily aids in maintaining the driver’s ability to steer while braking. When a vehicle brakes suddenly, there's a risk that the rear wheels could lock up, especially in slippery conditions. When this occurs, the driver can lose control steering the vehicle, making it difficult to navigate.

RWAL works by preventing the rear wheels from locking while allowing the front wheels to remain under control. This modulation of brake pressure ensures that the vehicle can maintain traction and stability, thus enabling the driver to steer effectively.

While other aspects such as brake pressure and tire durability are important in overall vehicle safety, RWAL's critical function centers around enhancing steering control during braking, which is essential for avoiding accidents and maintaining safety on the road.