ive driven through crap like this multiple times, the problem is that people still keep their agenda for the day, and truckers tend to believe that because they are in a truck that snow cant stop them.
I got side swiped by a transport truck that hit and ran me about 6 years ago. He along with his convoy of trucks all decided that the rest of the citizens on the road slowing down and following eachother appropriately in extremely hazardous driving conditions were jeapordizing them making their delivery time. Their solution was to attempt to drive and pass everyone through a 2 foot snowdrift in the passing lane which subsequently resulted in the the truck just smashing into my car with no regard for me being on the road. The A hole knowing that there was no way I could see his plates continued on his way leaving me with a totalled car.
Driving in a complete white out isnt hard...you just slow down until you can see where you are going, if that means you drive 5kmh then so be it...the problem is that there are people that think they can still drive 100kmh because they have 4 wheel drive and winter tires.