Cargo that can damage the environment and living organisms is considered to be the dangerous. Transport and permits specially equipped are necessary for transportation for such cargo.

Dangerous cargoes are divided into nine classes by UN:

1 class – explosive materials and objects;

2 class – compressed and pressure gases;

3 Class – easily flammable fluids;

4 class – easily flammable substances and organic peoxides;

5th grade – stimulating substances and organic peoxides;

6 classes – poisonous and infectious substances;

7 class – radioactive substances;

8 class – stimulants;

9 Class – Other dangerous substances.