We just traveled about a month ago. There were some pretty serious sections of construction. We were towing a 37 foot 5th wheel and we were the slow pokes on the road and we still had stuff tossed around. Things that had never, ever moved while traveling in the lower 48 and we have Moryde IS suspension too. Construction was worse going south in late August than it was in June going north. Just drive slow and in our opinion, the heaves and rough road were not marked very well. After a while, you can tell by looking ahead where the bad sections of road are. The heaves are generally only marked when the road is good. When the road is not great, we saw no markings.