A roadblock or checkpoint is traditionally read as a test before you may go on. It points to an obstacle that asks you to show who you are or explain your purpose.
Has this come up in your dreams before? What was going on in your life then?
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.