If you dream that you are in a corridor you are probably going through a period of transition in real life. You could be changing schools or jobs, moving home, or beginning or ending a relationship. You could be changing your attitude toward something or changing your behavior, perhaps giving up a bad habit or going through a period of self-improvement.
A corridor in a dream can represent a passage toward a new level of spiritual awareness.
Finding yourself trapped in a corridor in a dream can mean that you are not ready to accept a change that is taking place in your life. Being trapped in a corridor can also mean that you feel unable to make a difficult decision.
A dream that you watch someone you know walk away from you and then pass through a corridor can mean that you have noticed a change in them but you do not accept or understand it.