Whether the frost heaves are marked or not, after awhile a person will get where they know they are on permafrost by the vegetation growing besides the road. About all you will find on frost as willows, stunted black spruce and tamarack trees. Just keep an eye out for those and you will know when you need to slow down. Remember, the road is not moving, just your vehicle so the damage you do to your rig will be tied to your speed. Slow down doesn't mean to drop down to the speed limit. You may need to drive at 5 or 10 mph at times. It is an easy day's drive from 1202 to the Alaska border, even going nice and slow, plus most of us are on vacation/holiday so no need to get in a hurry, IMHO.