How does the active lane assist feature work in an Audi A8?

I am curious about the active lane assist feature in the Audi A8. Can anyone explain how it works and if it is worth the additional cost?

The active lane assist feature in the Audi A8 uses cameras to monitor lane markings and will gently steer your car back into the lane if you start to drift. It's definitely worth the cost for added safety on the road.

Active lane assist is a must-have for long highway drives. It keeps you centered in your lane and can even help with minor adjustments for curves. Highly recommend it in the A8!