In which situations are you not allowed to enter a junction even though the traffic light is green?

Your answer is correct because in German traffic rules, even if the traffic light is green, you must not enter a junction if you would have to stop within it due to traffic congestion. This prevents blocking the intersection and ensures smooth traffic flow. Additionally, if a police officer signals you to stop, their instructions take precedence over traffic lights, so you must obey them regardless of the signal color. The "Stop. Give way" sign does not apply if a traffic light is controlling the junction; the light takes priority. Understanding this helps avoid causing traffic jams and ensures safety at intersections.