The lane keeping assist system warns you with acoustic, haptic or optical signals. What might be the cause of this?

You answered correctly. Lane keeping assist systems monitor your vehicle’s position within the lane. If your car approaches or crosses the lane markings at the edge of the road, the system may warn you using sounds, vibrations, or visual alerts. This helps prevent unintentional lane departure, a common cause of accidents. The warnings are not triggered by following distance or other vehicles overtaking you—only by your vehicle nearing the lane boundaries. In future questions, remember that lane keeping assist is specifically about your car’s position relative to the lane markings.