Hi aixbrick,
Sorry for the inconvenience my edit was indeed too large. Does marking the bridge section (https://www.openstreetmap.org/way/35341296) with highway=construction would be ok ? the access:conditional tag is insufficient for routing engines to consider this road closed to traffic Graphhopper, OSRM and Valhalla all goes through it (eg. https://www.openstreetmap.org/directions?engine=fossgis_valhalla_car&route=50.7838%2C6.1265%3B50.7978%2C6.1514)