I think you want the viewer to look and get focused on the cool lighting in the tunnel. At least I want to look at that tunnel. The road leads you there. But the tree's do not. They are very much of distraction in this shot. Try next time thinking about different angles/views/ (ie overall composition) that try to lead the view to your subject. Or at least compliment the subject.
These are the hardest comments to make, because its not about your lighting or post-processing (actually I think you did those really well here) but your overall composition of the shot. Unfortunately, that makes going out and taking another shot.
I think this shot deserved a higher rating than it got. It really should not have been in the last 100. The one thing that I would say is that the sky is a little blown out. Some clouds would help break it up so its not so white or a tad less on the exposure side would have helped a bit. I'll email you what I did to change the photo. All I did was crop it a bit and change the saturation.