I don't see how they did this even if they were trying to do it.
15°F was the high for the day.
Probably under 10°F at the time of accident
64 vehicles, 73 people, 3 fatalities
Sudden snow squall
Sudden white out
Black boxes are not completely analyzed.
Probably 3 to 6 weeks of analysis.
Contributing factors are unknown yet.
In heavy traffic, people follow too closely to prevent the space in front being constantly filled by other drivers who do not respect following distance.
Some trucks may try to pass at under a 5 mph speed difference.
Oblivious drivers at below speed limit or below the speed of traffic flow in the passing lane.
Drifting snow but wind swept clear patches of roadway give false sense of security.
One victim reported instantaneous disappearance of the car in front in the sudden white out. One victim reported no response when braking which would probably have been due to ice.
Probably somebody, in a panic, jammed on the brakes.
There were at least two double-bottom rigs involved.
Initially, there were no reports of anybody doing anything that was clearly unsafe.
The most dangerous time for truck drivers getting drowsy is likely between 2 and 5 in the morning. There is nothing to indicate that any drivers were performing erratically as if they were drowsy.
Off-Off-Topic: Self-driving cars would have got it wrong as well, likely.