It is Dirt Road 3 <kuid:135229:100212> by dricketts.
 
If I understand the history correctly, the texture is originally from simulatortrain and he gave Derrick permission to create Dirt Road 3 with it (by reskinning one of simulatortrain's road splines). I was also given the same texture to create a set of crossing humps for Mr Ricketts so he could match the road. My crossing humps and boards are now on the DLS, but I'm a bit confused as to where the road spline can be found, or even if it is available yet. 
I have sent a PM to dricketts and I'm waiting for his reply on that.
Both simulatortrain and dricketts have assets that can be obtained from USLW.net. I had a brief look there tonight but the site is unfortunately not really easy to search and I did not see Dirt Road 3 there.
When Derrick replies, I will post an answer. He may even see this and tell you himself.