[jvm_]

Lanes in heavy snow covered roads are more of a suggestion. You can either drive on the bare 'wagon tracks' of road, or on the proper lane (that you can't even see) with 6-12 inches of snow on them.

Often when driving like this, you see a glimpse of the middle-yellow line inside one of the wagon tracks, and you realize that you're actually driving in part of the other lane. Fortunately the opposing traffic's wagon tracks are also shifted so that they're driving partially on the shoulder.

A GPS guided car would make a mess of the wagon track pattern that all the humans decided to just go with.

[Retric]

I am not talking 6-12 inches, when it’s 4+ feet of snow even pickup trucks need to stick to the valley’s which rarely have much to do with traffic lanes.