Landscape splines to make roads???

After finally getting my grass painted down and fixed I wanted to make a road thru my land. So I grabbed a road mesh and made a few splines and applied the road mesh.

Parts of my road is above ground and parts of my road is below ground and parts of my road is flying.

I’ve tried everything to get it smooth with the landscape, any tips on how to get decently painted on roads flat with the landscape?

Also, since I used paint to apply my grass, am i going to have to paint with a dirt layer under my road every time I apply the road? Cause the grass is sticking up thru the road.

just use the landscape splines to adopt to the landscapes geometry, then youre problem is solved!
look at the documentation for landscape and splines