A train crash stands for a long-planned course suddenly going off the rails. It is read as fear that a routine or commitment will break down, and as the anxiety of change you cannot steer.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.