- service way is already mapped: check
- buildings/addresses 3, 3b, 3d, 3c are already mapped: check
a,d,f don't exist based on NRW Atlas and logic (no more building left which needs an address).
=> The sign at the start of this service driveway looks like a privately/personally designed sign (no official STVO one) and is nonsense. Maybe they were too lazy to list only the existing numbers and just printed the range. I see no todo for OSM mappers here. I see a todo for the sign printer ;) ;)