What can negatively affect the functioning of the lane keep assist system?

You are correct. All three factors can negatively affect the lane keep assist system. Poor weather conditions like rain, snow, or fog can make it difficult for the sensors or cameras to detect the lane markings. Worn or unclear road markings may be hard for the system to recognize, potentially causing it to fail. Additional road markings in construction zones can confuse the system, as it may not be able to determine the correct lane to follow. Always be aware that these situations can reduce the reliability of lane keep assist and be ready to control the vehicle yourself.