I am doing the [Introduction to Camera Tracking][1] tutorial by Blender Guru and at some point he is applying a texture to create cracks in the road (around the hole, see image below). 

[![enter image description here][2]][2]

As you can see there are no cracks visible in this image. Blender Guru is working with Blender Render, I use Cycles. Basically I don't know to do this in Cycles. Who can help ? Blend file with texture packed attached.

P.S I know there is also an issue with the floor but I think I can only ask one question 




  [1]: https://www.youtube.com/watch?v=CVPcT0dJmoY
  [2]: https://i.sstatic.net/4xWJ2.png