9.3 Multimodal Transport and Points of Interchange

One consignment can meet several transport systems

ADR basic training includes information on multimodal transport operations. A load may travel by road to a ferry, continue by rail, or be delivered to an airport. The road journey is one part of that operation. The common UN framework helps the systems use familiar UN numbers and hazard concepts, but does not make every mode’s detailed requirements interchangeable.

The main references are ADR for road, RID for rail, ADN for inland waterways, the IMDG Code for sea and the ICAO Technical Instructions for air. A basic ADR driver certificate is not a marine shipper declaration, an air dangerous goods qualification or a permission to accept any consignment that bears a familiar diamond.

Know what changes at the handover

Do not infer that a sea or air shipment is exempt from road duties merely because it has another mode’s document. The responsible consignor/carrier must establish the permitted transport-chain provisions and remaining ADR obligations.

The specific ADR transport-chain provisions

ADR 1.1.4.2 provides specified recognition of packages and transport units that meet IMDG or ICAO requirements in a transport chain including sea or air. It is conditional recognition, not a general choice of whichever rule seems easiest. The relevant packaging, marking, labelling, placarding, segregation and documentation conditions must be examined together.

For example, the air Y limited-quantity mark is recognised under the applicable ADR provisions, but the ordinary road LQ mark does not establish air acceptance. Maritime identification on a container may remain appropriate in the specified chain, while the carrying road vehicle still needs its applicable orange plates. Where 1.1.4.2.1 is used, the transport document requires the applicable statement under 5.4.1.1.7. The driver should receive a confirmed consignment, not be asked to invent the statement at a port gate.

A ferry carrying the road vehicle and its load is not the same arrangement as unloading packages and transferring them to another vehicle. Rules concerning a vehicle carried on another mode, including 1.1.4.5, must be handled within the actual transport plan. Follow the ferry/terminal instructions, secure the vehicle as required and do not open packages to satisfy an informal request.

Container/vehicle packing certificate

Under 5.4.2, dangerous goods in a container or vehicle preceding a sea voyage require the applicable container/vehicle packing certificate in accordance with IMDG 5.4.2, subject to the stated exceptions. It records that the packing operation met its requirements. It is not the same as a dangerous goods transport description or an ADR driver card.

The certificate may be combined with the transport document when the required information and declarations are included. The responsible person signs for the packing operation. A driver who did not perform or verify that operation must not certify facts simply because the terminal wants a signature. Resolve missing or inaccurate certification through the responsible packer/carrier before acceptance.

Do not confuse a freight container’s approval/identification plate with this packing certificate. Neither of those is the annual ADR vehicle approval for a designated FL, AT, EX or MEMU vehicle. Similar-looking documents certify different things.

Physical checks at an interchange

A sealed freight container can conceal damaged or badly restrained goods. The carrier’s external checks remain meaningful even where opening the unit is not appropriate. Examine visible condition, required placards/marks, door/security arrangements and the carrier’s documentation. Verify container attachment/twist-locks and weight information through the approved procedure. Report leakage, bulging, severe damage or suspicious odour without entering the unit.

Fumigated units and units with asphyxiating coolants need particular care. A warning mark is a reason to follow the controlled ventilation/entry procedure, not to open the doors and walk inside wearing a generic escape mask. A removed seal or terminal instruction does not prove that an atmosphere is safe.

At rail or sea interfaces, loads can experience forces and handling different from an ordinary road leg. A road restraint arrangement should not be certified for the next mode by guesswork. The responsible packing plan must address the whole intended journey, including package orientation, blocking, restraint and applicable segregation.

Worked port-refusal scenario

A road driver arrives with a container of packaged dangerous goods. The road transport description is present, but the terminal identifies a missing packing certificate and a placard discrepancy. The correct response is to stop the handover in a safe authorised location, contact the carrier/packer and obtain corrected documentation and identification. It is not sufficient to say “the road police accepted it” or to sign a blank certificate.

If the sea booking changes, confirm that the revised operator and route accept the goods and that documents, environmental permissions where relevant, and planned road restrictions remain valid. Returning from a terminal with the same dangerous goods does not make the vehicle empty or permit the orange plates to be folded away.

The basic-driver skill is accurate boundary recognition: know the next mode, know which documents and visible conditions must be established, and refer specialist certification to the responsible trained person while keeping the load safe.

Source checked 17 October 2026: ADR 2025, 1.1.4.2, 1.1.4.5, 3.4.8, 5.4.1.1.7 and 5.4.2.