Hi, Sorry to say that the duplication of highways is still happening. Please see here for duplicate edges layer:- https://tools.geofabrik.de/osmi/?view=routing&lon=-1.09500&lat=51.64665&zoom=11&baselayer=Geofabrik%20Standard&overlays=duplicated_edges%2Cduplicated_edges%2Cduplicated_edges_areas

Regards Bernard.