I look up road construction articles on various interstates that are works in progress, and I do find these stupid work zone accident articles among them. I am so glad I took heed from you and Haiku Guy to just take it easy in those zones and do the speed limit. Some of these people are nuts.
Often it is the relative speed which kilos. In a construction zone, you might have one vehicle doing 70 and another doing 10. That is a lot of energy to dissipate.