Looks really nice, I particularly like the tall grass appearance you've given it!
Would you share how you're getting the tall grass effect? Did you lay down a lot of vegetation or is it a wall or ???? I can see that you mix in several varieties of grass and shrubs.
Nice track, I love the feeling of driving, and it remember me some roads at home.
Perhaps just a little thing, the junction between road and grass can be more smooth to brake the angles.
Keep on going !