If you come across a crash involving a vehicle that is carrying dangerous goods, you will need to be extremely careful. Never make a rescue attempt unless you are sure you are not endangering yourself by coming into contact with dangerous substances.
Vehicles carrying dangerous goods must display a placard that indicates the type of dangerous substance being carried. Some of the most common placards are shown here. You should familiarise yourself with these placards and what they mean.
Make a careful note of the colour and symbol on the placard and give this information to the emergency services when phoning to report a crash and when they arrive at the crash site. Keep bystanders well away from the crash scene and upwind of poisonous fumes.