I am guessing the guy on the bike is the silhouette and subject of the photograph but he is just a bit to small and insignificant for me to notice. My eye is drawn down the road and between the building to the "light at the end of the tunnel".
This is an interesting image but it doesn't meet the Silhouette challenge for me. Detail is visible on the rider and he should instead by totally black. I love the shadow on the ground but it is also not a silhouette.
I like the sun rays in this but would probably crop it above the white strips at the bottom to make a more solid image.