A standard including rules for the transportation of flammable, explosive, and combustible materials by road, requiring necessary documents in vehicles and drivers. Classes are specified as; Class 1: Explosives, Class 2: Gases, Class 3: Flammable Liquids, Class 4.1: Flammable Solids, Class 4.2: Substances liable to self-ignition, Class 4.3: Substances which, on contact with water, emit flammable gases, Class 5.1: Oxidizing substances, Class 5.2: Organic peroxides, Class 6.1: Toxic substances, Class 6.2: Infectious substances, Class 7: Radioactive substances, Class 8: Corrosive substances, Class 9: Miscellaneous dangerous substances.