ADR road dangerous goods: vehicle, driver and paperwork controls

How the agreement becomes binding law

The agreement is a treaty between contracting states covering international road movements of dangerous goods, revised on a regular cycle to keep pace with the underlying classification system. Within the European Union its provisions are given effect for both international and domestic carriage through a directive on the inland transport of dangerous goods, which extends the same technical annexes to national journeys and does the equivalent job for rail and inland waterway. The practical result for an operator is that there is no meaningful domestic exemption to fall back on inside the Union. A vehicle running hazardous goods between two points in the same member state is generally working to the same technical requirements as one crossing a border.

The vehicle, its marking and its equipment

Transport units carrying dangerous goods above the relevant thresholds display plain orange plates, with hazard identification and substance identification numbers shown where the load requires it, and hazard placards corresponding to the classes carried. Certain vehicles, notably tankers and those carrying explosives, require an approval certificate confirming they meet construction and equipment standards for the goods concerned. Equipment carried on the unit typically includes fire extinguishers sized to the vehicle, wheel chocks, warning devices, eye protection and personal protective items for the crew, plus items specified for the particular hazards. Roadside enforcement checks this list because it is objective and quick, which makes missing kit one of the more common findings.

Driver competence and the safety adviser

Drivers of vehicles carrying dangerous goods above the thresholds hold a training certificate covering the general requirements and, where relevant, specialisation for tanks or for explosive and radioactive material, renewed periodically. Below the thresholds, drivers and other staff still require training appropriate to their duties. Separately, undertakings whose activities involve the carriage of dangerous goods appoint a safety adviser responsible for monitoring compliance, advising the business and producing an annual report and incident reports. The role is often outsourced, which is acceptable, but an adviser who never sees the depot cannot do the monitoring the appointment exists for.

Documents in the cab and instructions in writing

The transport document identifies each dangerous substance with its identification number, proper shipping name, labels, packing group, number and description of packages and total quantity, following a prescribed sequence. It travels with the load. Written instructions in a standard format describe the actions the crew should take in an emergency, and must be available in a language each crew member can read. Where applicable, the consignment is accompanied by a container or vehicle packing certificate and by any special approvals. Tunnel restriction codes assigned to substances then interact with the categories that national authorities apply to individual tunnels, which is why routeing is a compliance decision and not only a commercial one.

Exemptions that make small quantities workable

The regime scales. Limited quantity provisions allow suitably small inner packagings in an outer package to travel with a distinctive mark and substantially reduced requirements. Excepted quantities go further for very small amounts. There is also a threshold-based partial exemption calculated from the quantity carried per transport unit, below which several requirements including placarding and the driver certificate fall away, although training, documentation and basic packaging duties remain. These provisions are widely used by distributors and parcel operators, and equally widely misapplied. The thresholds depend on the transport category of the goods, and mixing substances on one unit changes the calculation, so the exemption should be worked out per load rather than assumed from experience.

Frequently asked questions

Does the road agreement apply to purely domestic journeys?

In the European Union its technical annexes are extended to national carriage through the directive on inland transport of dangerous goods, so domestic movements are generally held to the same standards. Outside the Union the position depends on how each state has implemented the agreement.

When does a driver need the specialised training certificate?

Above the relevant quantity thresholds, and with additional specialisation for carriage in tanks and for explosive or radioactive material. Below the thresholds the driver still needs training appropriate to the duties performed, even though the formal certificate may not be required.

Why do tunnels matter when planning a hazardous route?

Substances carry tunnel restriction codes and individual tunnels are assigned categories by the responsible authority, so certain loads may not pass through certain tunnels at all. Routeing therefore has to be checked against the goods before dispatch rather than left to the driver's navigation device.