Carrying dangerous goods is one of the few areas of road transport where the law reaches into the cab and lists the physical equipment that must be there. HSE’s carriage of dangerous goods manual puts it plainly: Part 8 of ADR covers most of what the carrier has to deal with, including driver training, documentation, and equipment to be carried - fire extinguishers, wheel chocks, a pocket lamp, warning signs and a warning vest. This is not best practice guidance; it is the equipment schedule that turns an ordinary truck into a compliant dangerous goods vehicle.
Two definitions do a lot of work in ADR Part 8, and HSE’s manual draws the distinction carefully. Some duties attach to the transport unit and some to the vehicle. A transport unit is the whole outfit - a tractor unit with semi-trailer, or a rigid with a drawbar trailer. A vehicle, for ADR purposes, includes a trailer. So an artic or a drawbar combination is two vehicles but one transport unit. When you are checking what must be carried, you need to know which side of that line each requirement sits on - equipment counted per transport unit is not doubled just because you are pulling a trailer.
The GB regulations add their own national flavour. HSE notes that Regulation 5 implements ADR’s requirements in this area, while Regulation 6 requires GB vehicles on national journeys to use Emergency Action Codes rather than Hazard Identification Numbers when carrying in tanks or bulk. Tank carriage carries a further requirement to display a telephone number, with the detail in Schedule 1 of the CDG Regulations. If you run tankers domestically, that EAC-versus-HIN distinction is exactly the kind of thing a roadside examiner will check first.
The core kit named in Part 8 - fire extinguishers, wheel chocks, a pocket lamp, warning signs and a warning vest - answers practical scenarios. The extinguisher provision is about a crew able to attack a small cab or tyre fire before it reaches the load. The wheel chock is for any stop on a gradient where the parking brake alone should not be trusted with a dangerous load. The pocket lamp is personal lighting that works when vehicle electrics do not - and in flammable atmospheres, the lamp itself must be suitable for the environment. Warning signs and the warning vest protect the crew working around a casualty on a live carriageway.
The operational point for fleets: this equipment must be present, serviceable, and accessible - and the driver must know it is there. An extinguisher buried under pallet wrap, or one whose service date expired two years ago, is equipment you do not have in the eyes of an inspector.
HSE’s summary places equipment alongside driver training and documentation, and the three travel together. The driver of a dangerous goods vehicle needs the relevant ADR training certificate for the class being carried. The documentation - the transport document with the dangerous goods information, and instructions in writing for the crew - must accompany the load. Equipment without the paperwork, or paperwork without a trained driver, fails the whole carriage. Examiners at the roadside treat them as one system because they are one system.
Mixed fleets face a practical problem: which vehicles get the kit? If a tractor unit might pull a dangerous goods semi-trailer on Tuesday and a curtainsider on Wednesday, the equipment decision has to follow the work, not the vehicle’s usual job. The cleanest solutions are either dedicated dangerous-goods outfits with sealed, checked kit, or a documented swap procedure where the equipment box travels with the driver to any unit taking dangerous goods work. What fails is the informal approach - the kit that “usually lives in unit 12” when unit 12 is in the workshop.
ADR equipment belongs in the walkaround routine for dangerous goods work: extinguisher present and in date, chock present, lamp working, signs and vest to hand, transport document and instructions in writing in the cab, driver certificate valid for the class on board. Thirty seconds at the start of the shift, and the difference between a clean roadside stop and a prohibition is nothing more exotic than a checklist.
The larger point HSE’s manual makes is that Part 8 is, in principle, not complicated - the intricacies are in the details, and the details are knowable. An operator carrying dangerous goods has chosen the most regulated work in road transport. The equipment schedule is the visible tip of that choice, and it is the part you can audit this afternoon with a walk around the yard.