Where should a solo motorcyclist position their vehicle within a standard traffic lane under normal driving conditions?

1. In the third of the lane that maximizes visibility and cushion of space (typically the left or right wheel track of cars, avoiding the oily center)
2. Directly along the edge of the gutter next to the curb at all times
3. Always straddling the painted dividing line between two lanes
4. Directly in the center where oil and grease deposits accumulate from leaking vehicle engines