So I gave up on the 'dirt road' concept, and it is now a paved road. Which looks just as good. I think the gravel road would have been too warm of a colour, and the paved grey seems to work better with the sky, since it's a lot cooler.
So all that's left is the hydro poles / lines and touch-ups (nothing specific right now, just whatever I think might need a little adjustment as I look at it longer).
Eeee, almost done my first 'great' piece!!!