For me the subject of the photo is the person walking down the tunnel. She looks in as sad a condition as her surroundings. From your title and narration I would interprete the scene to be that she is traveling in life towards a light at the end of the tunnel. But, the problem with this is that the pictured "end" of the tunnel seems no better than the tunnel itself. So, I would have to presume an element not included in the capture: faith that a better end can be found. But, the element of "faith" is not shown in the photo. How do you do that? You're the artist. You tell me.
There's something very unsettling about this photo that I find compelling. Tunnels and subways have a sinister quality, and if this is what you intended to capture, then for me it has worked. Maybe that ties in with Bob's comment that the life the subject is moving towards is no better than the tunnel itself?
Technically, the "rule of thirds" comes into play nicely with your positioning of the subject, while the high contrast and slightly off-horizontal orientation add to the uneasiness.
I like it, good luck!
~In His Love~ Maggi D For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek. Romans 1:16
Subways give me the 'creeps', strange lack of graffiti in this one which makes it even creepier, like deviant youth doesn't even use it. It is a compelling picture, especially in B&W.
A photograph, like life, is only a moment in time.