This type of dream also suggests that due being careless and doing mistakes, you can suffer a serious accident.... (Assault)
Wearing a warrior’s helmet in a dream also means safety of one’s property and protection from an accident.... (Helmet)
Your dream mainly consists of these symbols: train, accident. For deeper and better understanding it's recommended to read the individual meanings of each symbol. To find out what other interpretations, that are based on distinct character's symbolism, the dream about train accident have, click on these links: train, accident, or you can search manually by using synonyms of these words.