Safety helmets are often used to protect people from head injuries such as high-risk jobs and less safe vehicles such as motorcycles. Hardhats in dreams often represent parents, elders, laws and other people who protect them or regulations and forces.

Dreaming of taking off his helmet and suddenly feeling very relaxed, indicating that he would get rid of some of the regulations that bound him, but he would get into trouble because of it.

Dreaming that the accident was avoided because of the helmet, indicating that he would do nothing.