Overtaking on the left

Normally, you overtake on the left. A logical consequence of this is that after overtaking, you move back to the right to give other vehicles wishing to overtake, the opportunity to do so.
What you often see, especially on motorways, is that a car that has overtaken keeps driving in the middle lane or even worse in the leftmost lane. This creates dangerous situations; this car can then be overtaken on the right. In addition, it is very possible that this car causes the much-discussed tailgating. Not for nothing is the place on the road: “as far right as possible”.
Keep in mind that even if you are allowed to overtake, only overtake if it is really 100% safe to do so. So when in doubt, never overtake.

The CBR asks many questions on this topic in the theory exam.
The question is then, “You want to overtake now. Is that allowed?”
If you look at the picture too quickly, you will only see the broken lines and might answer with: “Yes, that is allowed.”
If you look at the image a little more closely, you will see a slope plus a blind turn. If you cannot see far enough ahead that the road is clear to overtake, you always choose: “No”. Not only at the CBR, but also later when driving your own car, or on a moped or motorbike!