Oh man I'd have made a bit more of the parallels of the barrier and the roadway ... perhaps justnshot a little lower, just to bring the barrier a little more strongly into frame. Great idea though, and good solid shooting. Given the high-key landscape shot it calls out for a graduated filter, just to calm the exposure of the clouds, but that's your won choice: I just think it would accentuate the graphic elements of the composition a touch more. Neat idea though, and good shot.
i like the composition with the bit of man made stuff in the lower left corner. i'm wondering if there was something you could have done to have brought out the blue in the sky a bit more . . .
I think you've got too much in this shot making it seem busy, maybe composing it in a way that left the guard rail out of the foreground would work better, colors are good