A traffic cone is read as a temporary warning, a sign that something is under repair. Tradition sees it as a part of life that is being reworked and needs care for a while.
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.