Anything above 3 lanes is no longer a highway, it's a mental illness

No, there is only one regular lane in each direction. And if you want to pass you take the second land. The third lane is to pass someone who is passing someone. The forth lane is to pass someone who is passing someone who is passing someone. And so further.

If there are six lanes, the sixt lane is to pass someone who is passing someone who is passing someone who is passing someone who is passing someone who is driving in the regular lane.

The speed does not matter.