This one I like. I'm guessing it's not doing overly well, since it's not what's normally a 'winner'. But, I really like the speed and the sharpness of the belt. Well done!
I'm all about Safety First - it's my job. The photo is very crisp but for me, rather uninteresting. Luckily, I don't rate photo on how interesting they are to me but rather on their quality and pertinence to the challenge.
You managed to take a pretty bland subject and make it visually interesting. Looks like a little too much sunlight coming in, which is blowing out areas. I like the composition.