How do i prevent highway hypnosis?

Many strategies: From a website (cited in comments): "suggestions to avoid highway hypnosis include: don’t eat a big meal before starting out on a long drive; stop every couple of hours to stretch your legs; don’t drive during the hours that you’re normally sleeping; talk to your passengers; open the window, get fresh air circulating through the car." caffeine & listening to talk radio can help too. See comment:.