This is a driver assist not an autopilot !
They need to combine techniques and multiple systems over larger areas for redundancy and increased AI. At least 4 sensors: Daylight vision, IR, LIDAR & GPS. If just 1 of these systems can see a possible danger then assume this as being correct. If a system has unreliable readings that don't match expectations then slow down, proceed with caution depending on the limits of the other sensors. If there are conditions or objects obscuring the view of the sensor then don't assume everything is perfect. Don't take the sky or lane lines for granted. Watch the driver at all times, if they stop paying attention then alert and slow down until the driver reacts correctly. This is a driver assist system not an autopilot.