The track was made using one of the metal trims in TF2. I cut it up into 3 parts and changed the brightness of the middle section to make it appear deeper. Using the burn tool, I baked in some shadows to help "ease" the textures into each other. After that I just added some outer glow to produce some shadows and the result is as you can see.
What your texture lacks is detail and, as I said, your tracks are just solid colour rectangles with no indication of what material it is and this is why people have pointed the lack of "material definition" as Snipergen rightly said.
Experiment with the burn and dodge tools and use images from sites like
CGTextures as a basis for your textures.