Under what circumstances may you cross a junction during a red light?

You answered correctly. In Germany, you may cross a junction during a red light if a police officer is directing you to do so or if you need to move carefully out of the way for an emergency vehicle with blue lights and a siren. The rule ensures emergency situations and direct police instructions always take precedence over traffic lights. In all other cases, going through a red light is strictly prohibited. Remember these exceptions for similar questions in the future.