At these traffic lights with a green arrow sign, where should a vehicle stop before turning right?

You answered correctly! With a green arrow sign at a red traffic light, you are allowed to turn right, but you must still **fully stop first**. If there is a stop line, you stop at the stop line. If there is no stop line, you must stop before entering the intersection or crossing. After stopping and checking for pedestrians or cross-traffic, you may proceed. This rule is for safety and follows the "stop-and-go" principle required with the green arrow sign in Germany. Never turn without stopping—this ensures everyone’s safety at the intersection.