Highway hypnosis

Highway hypnosis, also known as white line fever, is a mental state in which a person can drive a truck or other automobile great distances, responding to external events in the expected and correct manner with no recollection of having consciously done so. In this state, the driver's conscious mind is apparently fully focused elsewhere, with seemingly direct processing of the masses of information needed to drive safely. Highway hypnosis is a manifestation of the common process of automaticity, where the conscious and unconscious minds are able to concentrate on different things.