The sign you mentioned, "Course of the priority road from bottom to left, intersection from above," indicates the direction in which a priority road continues. Specifically, it shows that as you approach an intersection, the priority road veers to the left while intersecting with another road from above.

In German traffic regulations, priority road signs indicate which road has the right of way. Vehicles on the priority road do not have to yield to traffic coming from other roads. In this case, if you are on this priority road, you should maintain your speed and right of way as you proceed left at the intersection.

It's important for drivers to be aware of such signs to ensure safe navigation at intersections and to understand when to yield to other vehicles.