When the snow is a foot deep on the highway, you can drive in any lane you want.
There's a certain bizarre logic to how it all works.
Drive slow. You can't really drive fast when there's that much snow. But not too slow. You've got to keep up a certain momentum.
Stay toward the middle of the road, not the edges. You don't want to fall off the edge. Then you're stuck. You won't really be hurt, because the snow is soft, but being stuck is no fun. Technically, AAA is a thing here, if you have cell service, but it might take all day to arrive.
If there are no tracks, you are on your own. This is fun. Make some new tracks. In the middle. Yup, stay in the middle.
If your vehicle gets a little squirrelly, you know that the next person to come along will see your squirrelly tracks and be forced to follow them somewhat. If you keep your head on straight and don't overcorrect, you can keep a little squirreliness from becoming an out-and-out fishtail, and then you can be proud of how well you handled yourself as you keep on your merry way.
If you are on a good, straight stretch with no obvious obstacles, you can increase your speed, shooting snow up around and behind your vehicle like crystalline white wings. It's a feeling designed to make you feel like a shooting star. A shooting star going maybe 40 miles per hour. Wheee!
If there are tracks already, it helps to follow them. Except in the places where they got a little squirrelly. Following existing tracks gives a certain degree of stability to the situation, and you can go a bit faster.