I agree with Martin there. Its a very good idea for a photo. You would want to try a number of angles – or even another location (as these runners are all over the place). They are something often ignored, because they are so very common. But they are of our time, and part of our urban landscape and, dare I say, culture.
They could make for a very striking photo.
But regarding the photo above. The first thing is that its slightly lobsided to the left (im one to speak :D). The sky, IMO, is quite noisey (is that what you call it?). I believe this may be down to having the settings on your camera to ‘automatic’ mode, or the standard Jpeg file they produce. Maybe a RAW photo would help reduce the noise. I havnt tried it myself though iv read it helps.