I really like the composition of this, and the energy of the guy on the right. One wonders what he's expressing, what he's planning to do if anything. Very nice exposure and contrast - i Like the blown out bit at the end of the tunnel.
As with the others, you have done a fine job with this image. Changes? Maybe if the closer men weren't quite as centered and perhaps if you had been standing a little further left (or closer to the men) so the overhead lights would have created an angle through the image to draw you in.
The comments are suggestions that might have improved it, this is a nice image.
I really like this, I also like the crop personally, although I think had someone been exiting the photo far right so you just caught the side of them that would have just finished it off for me :)
I love the B&W conversion and I like the way the lines lead me into the image.