I like the interpretation of the challenge topic. Judgeing by the amount of accidents during fog it does seem as though things disappear. I think I would like to see this without the shadowed beach in the foreground, maybe a closer perspective.
Is there a way to make the other portions of the image softer?? I find that the foreground is too sharp where the fog and the bridge are the main elements the foreground is taking away from the message of the image. Could you have cropped most of the bottom portion of the image out?? I don't know?? Just a suggestion.