Can hazardous goods travel in a groupage shipment?

ADR-classified goods travel in groupage freight subject to compatibility rules set out in the ADR regulations — not all hazardous classes and UN numbers are compatible for co-loading with non-hazardous goods or with other ADR substances in the same vehicle. The shipper must declare the ADR class, UN number, and packaging group at booking. The carrier confirms load compatibility against the other consignments planned for the vehicle before accepting the ADR goods into the grouped load. Undeclared ADR goods placed into a groupage vehicle breach carrier terms and the ADR regulation — the carrier cannot check compatibility without the upfront declaration from the shipper.