The functional IQ of the common motorist drops 20-30 points or more when snow is actually falling.
Yesterday I had to make a trip to the next town for a visit to the eye doctor. On the 20 mile trip to town the roads were slick and snow/ice packed but perfectly manageable in 2 wheel drive. Traffic on the road and in town was moving slowly and in a more or less orderly fashion. After the eye appointment we slid on over to wally world to get supplies for my mother in law and daughter who lives with her, they hadn't thought it necessary to stock up on essential like food and diapers before the storm hit
.
When we came out of Wal-Mart it was snowing at a pretty good rate.
People idiots were sliding all over the place, several vehicles in the ditch. It was like they had never seen snow before.