Even if HAS is a partially automated driving system, many factors can impact the performance of the Highway Assist System, causing it to be unable to function as intended. HAS is unable to guide the vehicle and assist the driver when visibility is poor: this can happen when you’re driving hills or sharp curves, when the forward-facing camera is obstructed or damaged, or when a bright light faces the camera.
You must always be aware of surrounding traffic and be extra-careful in a bad weather as heavy rain, snow or fog can drastically change the road conditions.