Why do you have to switch to the right-hand lane?

You are required to switch to the right-hand lane because that lane is designated for drivers who wish to turn right or leave the main road. According to German traffic rules, when the road splits and a lane branches off for turning or exiting, drivers intending to take that exit must move into the appropriate lane in time. This ensures clear traffic flow and prevents confusion or dangerous lane changes later. The red car needs to move right to follow the turn or exit safely, while other vehicles may continue straight in the left lane. Always observe road signs indicating lane splits and use your turn signal to show your intention well before changing lanes. This helps maintain order and safety on the road.