Highway hypnosis

Highway hypnosis, also known as white line fever, is an altered mental state in which an automobile driver can drive lengthy distances and respond adequately to external events with no recollection of consciously having done so.

[1] It appears that in this state, the driver's conscious attention is fully focused elsewhere, yet their brain is still able to process a significant amount of information related to the road and vehicle control on a subconscious level.

[4][6] Building on the theories of Ernest Hilgard (1986, 1992) that hypnosis is an altered state of awareness, some theorists hold that the consciousness can develop hypnotic dissociation.

Therefore, the following technical measures are sometimes taken to increase driver alertness: alternating between smooth asphalt and coarse gravel pavement, creating noticeable vibrations, and placing unexpected turns on straight, monotonous sections of the road.

[7] It is suggested that highway hypnosis arises due to monotonous scenery or the "flicker" of light glare and white lane markings, so drivers are advised to periodically change their gaze direction (e.g., look in the side mirrors or at the dashboard instruments).

[4] Highway hypnosis is often a precursor to falling asleep at the wheel, so at the first signs of drowsiness, the driver is advised to stop the car and rest or do light physical exercises.