How does the Audi A7's lane keeping assist feature work?

Can someone explain the technology behind the lane keeping assist feature in the Audi A7? Does it use cameras or sensors to detect lane markings? Is it reliable in different road and weather conditions?

The lane keeping assist feature in the Audi A7 uses a combination of cameras and sensors to detect lane markings and help keep the vehicle centered in its lane. It is designed to work in various road and weather conditions, but it is always important to remain alert and actively steer the vehicle as well.

I've found that the lane keeping assist in the Audi A7 works best on well-marked roads and in clear weather. In more challenging conditions, such as heavy rain or snow, it may not function as accurately.