We identified some mistake/missing for some Pset in the latest schema (IFC4x3 RC2).
In order to solve them asap during the schema development process please find below our proposal for the scope of following Psets that are badly defined:
Pset_RoadDesignCriteriaCommon : IfcRoad ;IfcReferent
Pset_SumpBusterCommon : IfcSign
Pset_Superelevation : IfcRoad ;IfcReferent
Pset_TrafficCalmingDeviceCommon : IfcElementAssembly
Let me know your feedback about this.