What is the rule at this traffic-light-controlled junction with additional signage?

The additional sign next to the traffic light shows a green arrow with the word "nur" (only) and a bicycle symbol. This means that cyclists are allowed to turn right even when the main traffic light is red. This exception applies exclusively to cyclists and not to motor vehicles.

This rule helps improve the flow and safety for cyclists at junctions by allowing them to cross or turn without waiting for the general green light. Motor vehicles must still wait for the green signal before turning. Understanding this specific exception can help you recognize when certain road user groups have separate permissions at traffic-light-controlled intersections.