COMPOSITION
I like how you have taken a picture of something "ordinary," or at least common, and used made it interesting by making it into an abstract. It is composed really well, I think, because the eye follows the ramp down the right and across the frame at the bottom, then loops back. excellent. Did you try flipping so that it would be a left to right flow? I don't know that it would have been necessarily better, just different.
The sky also produces negative space which is very effective in this shot to emphasize the bridges.
TECHNIQUE
The blue sky really makes this shot, though it almost seems a touch blown out at the bottom. Not enough to really detract though. I, personally, do not see the artifacts others are mentioning, but then again, maybe I need glasses or something. To me, it looks focused and clear. I like the way hte shadows help accentuate the motion. I do see some the moire pattern or banding in the sky. Perhaps NEATIMAGE, or another similar filter could help smooth that out
OVERALL EFFECT
This shot seems to serve to show the vastness of the road system. Though it is but a small part, and is a simple picture, it speaks of the massive confusion that sometimes comes when trying to navigate such things (especially for me!)
maybe a little too much negative space and your photo is only 12.5 kb which explains the jagged effect from compression. Still not bad from only 12.5kb.
Interesting and IMHO well done composition / cropping, I like it. Perhaps some more contrasts or structures (clouds) in the sky could have been helpful here, but I can't change the weather too ;-) Good luck for the challenge - 9
I really like the composition of this photo.. all the blue negative space is wonderful. However, I wish there was more detail on the bridge to the right - it looks like you used neatimage and it erased much of that detail. Too bad! 8 for a great photo anyway!
I imagine that this is croped to show only the bridge. Nice sharp focus and good lighting. Nice scale for height in front and low in the background. Fits the challenge well.