When you see a hallway in a dream, then such dream indicates the beginning of some journey you took while trying to find out who you are. The hallway is the symbol of the transition from one stage of your life to another one. Perhaps you are going to have magnificent changes in your waking life which will make you totally different person then you are now. The hallway is also the symbol of life and death and the way we have to get through while moving from one phase to another one.
Read more about dreaming of Hallways in other dream meanings interpretations.