The HGV and LGV appear to be the only one's using the road as intended is my observation during this brief clip tbh.
During the late seventies when we worked in West Germany for 3 years undertaking was quite common and appeared to be acceptable at the time OOI.
If memory serves me well HGV's were not allowed on the motorways on the Sunday unless they were carrying perishable goods - some of our German colleagues might like to say how it is nowadays ?