I made a road texture and matching roadbed heightmap and used it to make a tiling road terrain for an animation test. I made a couple of duplicate terrains and applied some vegetation mats I made with the help of DGC's EnhanceC.    I used some cellular noise from EnhanceC in an attempt to add random "alligator pavement" cracks that will help make the joint between terrain tiles more seamless. I'm still tweaking shaders as this is just a WIP. Still need to add occasional guardrails, signs, telephone poles etc.