I think that the score here reflects a few things. First, this photo isn't really OF a bridge. The title says that it is, but mainly I see a fence and some trees though I could probably guess that it was taken from on top of a bridge. Secondly, it just isn't too interesting. I can appreciate that the effect added some interest, but probably hurt it even more since many people do not like that sort of post processing manipulation. The diagonals created by the fence and the road below are nice lines, but there's little else going on. Overall, nice effort.
The inverse negativity of this image is an interesting choice that helps to highlight the chain link fence patterns and contrast them with the trees beyond. The rest just distracts my eyes. Try cropping even further to zero in on what is most interesting.
Cool inverse coloration, I like what it did for the background scene. I am assuming you are standing on the challenge bridge, right? The fence just doesn't do anything for me. 5 Swash
The use of IR/ the toning takes so much detail away that it is hard to make out what I am looking at. Sure you tell me, but the photo doesn't do that good enough. The fence is a bit dominant, not so nice to look at. Good luck.