There are certain roads where I live that are normally two lanes in each direction, but in the winter there's not enough traffic to need two lanes. When they ar

There are certain roads where I live that are normally two lanes in each direction, but in the winter there's not enough traffic to need two lanes. When they are heavily snow covered, they become one lane in each direction, straddling the painted lines. This is unofficial and probably illegal, but clearly safer, especially when snow from the plows starts piling up in the outer lanes. I wonder what self driving cars will make of situations like this?