1997 GMC Sonoma Owner's Manual - Page 175

Highway Hypnosis Is there actually sucha condition as "highway hypnosis"? Or is it just plain falling asleep at the wheel? Call it highway hypnosis, lackof awareness, or whatever. There is something aboutan easy stretch of road with the same scenery, along with the humof the tires on the road, the drone of the engine, and therush of the wind against the vehicle that can make you sleepy. Don't let it happen to you! If it does, your vehicle can leave the road in Zess than a second, and you could crash and be injured. What can you do about highway hypnosis? First,be aware that it can happen. Then here are sometips: e Make sure your vehicle is well ventilated, with a comfortably cool interior. e Keep your eyes moving. Scan the road ahead Hill and Mountain Roads and to the sides. Check your mirrors and your instruments frequently. e If you get sleepy, pull off the road into arest, service Driving on steep hills or mountains is different from driving in flat or rolling terrain. or parking area and take a nap, get some exercise, or both. For safety, treat drowsiness on the highway as an emergency. 4-37