ADR Classes Explained: The Nine Dangerous Goods Classes

How ADR is structured

ADR certification is modular. Everyone does the core module, which covers the legal framework, documentation, placarding, driver responsibilities, security and what to do in an incident. On top of that you add the classes you will be carrying, and the carriage type: packages, tanks, or both. Your certificate lists exactly what you are qualified for, and a haulier will check it against the loads they run.

That modularity is why ADR prices vary. A core plus packages certificate covering the common classes is a shorter course than core plus packages plus tanks with Class 1 and Class 7 added. Ours start from £496, with refreshers from £300.

The nine classes

Which classes matter in central Scotland

For most drivers working out of Glasgow and the wider central belt, the money is in Classes 2, 3, 8 and 9. Class 3 covers the fuel work around Grangemouth and the tanker distribution that runs from it. Class 2 covers LPG and industrial gases. Class 8 covers the chemical and cleaning product traffic. Class 9 has grown significantly because it now captures lithium battery movements, which are everywhere.

Classes 1 and 7 are specialist. Explosives work and radioactive material transport are smaller markets with tighter vetting, and drivers usually add those classes because a specific employer needs them, not speculatively.

Packages versus tanks

Packages covers goods carried in drums, IBCs, boxes and cylinders. Tanks covers bulk carriage in a tanker or tank container, which brings in loading and discharge procedures, static electricity, surge and rollover risk, and a stricter approach to parking and supervision. Tanks work generally pays more and tanker operators expect the tanks module as standard.

• Core plus packages is the usual starting point and the most widely useful certificate.
• Add tanks if you want fuel, chemical or gas distribution work.
• Add classes based on the employers you are targeting, not on collecting them all.
• Certificates last five years and refresher training is shorter and cheaper than the original.

What the training and exam involve

Training is classroom based, with practical elements covering equipment, fire extinguishers and personal protective equipment. Assessment is by SQA administered multiple choice examination, taken at the end of the course, with a separate paper for each module. Pass the papers and your ADR card is issued and valid for five years.

Plan your refresher before the certificate expires. Let it lapse and you sit the full course again rather than the shorter refresher, which is a needless extra cost.

What ADR does for your earnings

ADR is the highest return upgrade available to a qualified HGV driver. A Class 1 driver with ADR tanks is in a much smaller pool than a Class 1 driver without it, and rates reflect that, especially for night and weekend fuel work. It also makes you far less exposed when general haulage slows down, because fuel and chemical traffic keeps moving.

Who can take it

You need a full vocational licence for the vehicles you will drive, and in practice employers want some driving experience before putting you on dangerous goods work. Beyond that there is no barrier. We run ADR from our Glasgow base and cover the city and about 60 miles around it, which takes in Grangemouth, Lanarkshire, Renfrewshire and Ayrshire.