My first impression is "Cool." I really like the contrast of the orange supports and the blue sky. This is begging to be photographed again. . .
Compositionally, it seems a bit random to me, without a definite area for the eyes to "rest" on. The eyes are torn from looking to the "end of the tunnel" and the awesome randomness at top. That can be good in that it really sets a "mood" for the picture, and the puzzlement at teh top adds to the confusion the composition sets up.
Technically, the blown out spot on the left really spoils an otherwise great effect. Couldn't you ahve shot the light out with a bb gun, or sling shot or soemthing. (I AM JUST KIDDING). that being said, while the handrails make for some interesting leading lines, cropping the bottom half out sets up for a neat abstract.
Nice photography, taking it a step beyond a picture. this is frameable and quality work. Nice composition and location choice. This is one of my picks to ribbon. Excellent.
If people criticize the blown out highlights in the middle of the walkway, for me, I don't think it would be as great a picture without them. They're a great, warm counter to the blue of the sky. Very nice.
Very interesting object. I like the design itself. Nice colours and detail. I wonder how it would've look if you put the end of the bridge in center of the image.