Overtaking another car is read as ambition and competition — moving ahead of a rival or of your own past self. Being overtaken speaks of feeling left behind.
When this appeared in your dream, what were you feeling?
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.