Drivers on an express highway should avoid 'highway hypnosis' by

Expressway driving may cause highway hypnosis, a condition of drowsiness or unawareness induced by monotony, the sound of the wind, the tires on the pavement and the steady hum of the engine. Any time you become tired, pull over and rest. Use the radio and fresh air to ward off 'highway hypnosis'. Stop every hour to walk and exercise to stay alert.