After 15,000 years, it's waking up

I was driving in alaska from the border to anchorage in the 90s in the early spring and the roads were so heaved on the way some top heavy vehicles actually tipped if they were going too fast. this also was back in the day when the highway wasnt quite finished in canada so you were taking your chances the whole way :) but the blacktop in alaska was treacherous even then in the spring. I have heard stories from old buddies from then of 6 foot wide cracks opening on the highway overnight