What is highway hypnosis?

Highway hypnosis happens when people lose consciousness while driving a vehicle, frequently traveling a long distance without remembering it. Drivers may get drowsy for a short while or hundreds of kilometers after experiencing highway hypnosis.

It simply means when you lose consciousness while driving and cannot recall specific details of what occurred.

Highway hypnosis may sometimes occur on you without you realizing it, at least not until you've snapped out of it.

Specific warning signals include:

. drowsiness

. loss of focus

. heavy eyelids or repeated blinking

. dull or drowsy sensation

. sluggish reaction time

. wandering thoughts

Source: Healthline