Rule 284 (Incidents involving dangerous goods (rules 284 to 285)) Vehicles carrying dangerous goods in packages will be marked with plain orange reflective plates. Road tankers and vehicles carrying tank containers of dangerous goods will have hazard warning plates (see ‘Vehicle markings’).
Highway Code · Rule 284
Highway Code Rule 284
Breakdowns and incidents (275 to 287). Advisory guidance you are expected to follow.
- Breakdowns and incidents
- Advisory rule
- OGL v3.0
What the rule says
AdvisoryRule text reproduced verbatim from the official Highway Code (Crown copyright) under the Open Government Licence v3.0, see the attribution at the foot of this page.
In plain English
Stripped of the formal wording, Rule 284 comes down to one idea: rule 284 (Incidents involving dangerous goods (rules 284 to 285)) Vehicles carrying dangerous goods in packages will be marked with plain orange reflective plates. It is advice rather than law, but examiners and the courts still treat it as the expected standard of safe driving.
It belongs to the breakdowns and incidents part of the Code, the habits a confident, considerate driver builds until they are automatic. The aim is not to memorise the sentence word for word, but to understand the hazard it protects you from, so you apply it without having to think when it counts.
If you are learning, treat this rule as one piece of a connected set rather than an isolated fact. The related rules below sit in the same section and reinforce each other, reading them together is how the breakdowns and incidents part of the Code starts to feel like common sense rather than a list to revise.
Because this is advisory rather than legal, no one will fine you for the rule alone, but ignoring it can still count against you in a careless-driving case, and it will cost you faults on the test. Either way, the safe move is to build the habit early, while a driving instructor can correct it, rather than relearning it under test pressure. That is exactly what the practice routes and coaching in the DriveRoutes app are designed to help with, turning the rules below into the way you naturally drive.
Why rule 284 matters on the road
How you behave after a breakdown or incident protects you, your passengers and the people who stop to help. A calm, well-rehearsed response prevents a bad situation from becoming a dangerous one.
Common faults examiners record
In the breakdowns and incidents part of the Code, the faults most often written on the marking sheet tend to be the same handful. Knowing them in advance is the quickest way to drive them out of your own habits:
- Acting too late because the situation was read close rather than early.
- Incomplete observation before committing to a manoeuvre.
- An unsuitable speed for the road, the traffic or the conditions.
On the day
On the day, applying Rule 284 is about doing the safe, deliberate thing slightly earlier than feels necessary: read the situation in good time, observe fully, and act smoothly. The examiner is looking for planned driving, not perfection, and good habits formed in lessons carry you through.
Quick checklist
- Read the situation early and plan your response.
- Observe fully before you commit to anything.
- Keep your speed suitable for the road and conditions.
More from Breakdowns and incidents
Related Highway Code rules
- Rule 283Highway Code Rule 283Rule 283 (Incidents (rules 281 to 283)) If you are involved in an incident or collision or stop to give assistance - if possible, stop in a place of relative safety (see Rule 275) - use your hazard w…
- Rule 285Highway Code Rule 285Rule 285 (Incidents involving dangerous goods (rules 284 to 285)) If an incident involves a vehicle containing dangerous goods, follow the advice in Rule 283 and, in particular - switch off engines a…
- Rule 282Highway Code Rule 282Rule 282 (Incidents (rules 281 to 283)) When passing the scene of an incident, remain alert for hazards (such as debris or slow-moving vehicles) and do not slow down unnecessarily (for example, if an…
- Rule 286Highway Code Rule 286Rule 286 (Documentation (rules 286 to 287)) If you are involved in a collision which causes damage or injury to any other person, vehicle, animal or property, you MUST - stop.
- Rule 281Highway Code Rule 281Rule 281 (Incidents (rules 281 to 283)) Warning signs or flashing lights.
- Rule 287Highway Code Rule 287Rule 287 (Documentation (rules 286 to 287)) If another person is injured and you do not produce your insurance certificate at the time of the crash to a police officer or to anyone having reasonable…
Rule 284, your questions
Rule 284 (Incidents involving dangerous goods (rules 284 to 285)) Vehicles carrying dangerous goods in packages will be marked with plain orange reflective plates. It is advisory guidance rather than law, but you are still expected to follow it and an examiner can mark a fault if you do not.
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