Here in Germany filtering through the gap isn't allowed at all when the car is moving, turn indicators or not. Doesn't keep drivers from getting upset when it h

Here in Germany filtering through the gap isn't allowed at all when the car is moving, turn indicators or not. Doesn't keep drivers from getting upset when it happens while they are standing (then it's permitted). And it's certainly allowed on a separate lane, just like pedestrians on the sidewalk aren't required to walk slower than the traffic-stricken cars to their left. (when the lane is just painted and the right turn is unobstructed otherwise, I do like to change lanes to behind a right-indicating car: so much better flow than stopping them, while almost stopping myself to be prepared for a forced turn - one of the many reasons I prefer painted lanes)