Key legal question
Whether the order to obtain a traffic-medicine opinion could still be challenged
Extracted holding
No; that part was covered by res judicata because the earlier Verwaltungsgericht judgment of 25 May 2018 had become final and the authority was bound by its instructions.
Extracted reasoning
The previous remand decision was not appealed. Therefore any complaint against the ordering of the expert opinion was no longer admissible in this proceeding.