I know...and I know that I’m making some assumptions. But last year I was on an icy road like this one in Eastern Washington. Crossed into Idaho, not one bit of ice - difference, salt.
This video is amazing and should be studied by anyone who drives in those conditions - tons can be learned from it.
I likewise was held up in the panhandle of Texas west of Amarillo and once in New Mexico, boom the road was cleared. Now, NM is not noted for being the best about I-40, but it is all dependent where trucks are staged at the start of a bad storm.
It was hilly in Texas as well which made the poor clearing much more problematic for the drivers at speed.
Once one lane is covered, all avoidance options are gone.