This is how I normally make roads for modter bricks:

However, I want to make roads with grass to the sides of the corner of the road, like this for example:

But the collision box thing or whatever it is called forgets up the road, like this:

If it is hard to understand what I am saying, the two bricks I think are somehow colliding with each other.
So, I basically have to make hills around the road to fix this, or to build on a ridge or something.

This will forget up the brickcount for my builds, and I really need this.