1997 GMC Safari Owner's Manual - Page 198

What can you do about highway hypnosis? First, be aware that it can happen. Then here are some tips: a Make sure your vehicle is well ventilated, with a Hill and Mountain Roads comfortably cool interior. a Keep your eyes moving. Scan the road ahead and to the sides. Check your mirrors and your instruments frequently. 0 If you get sleepy, pull off the road into a rest, service or parking area and take a nap, get some exercise, or both. For safety, treat drowsiness on the highway as an emergency. Driving on steep hills or mountains is different from driving in flat or rolling terrain. 4-22