How to avoid stroke track matte intersections

I'm just wrapping up a tutorial on that kind of workflow. You need to create a separate layer that you can use to clean up the intersections and a duplicate of the Trim Paths layer that you can use to remove the matte when the stroke passes. It's pretty easy. This is what it looks like:

Here is a screenshot of the modified properties of the key layers:

I will post the tutorial when it is finished. I hope this gets you started.

Tying the Intersections Matte/Trim Paths/End to the Matte/Trim Paths/Start with a simple pickwhip expression, then adding Set Matte/Intersections to the original layer so that the funky intersection is hidden is the key to easily making this work. When I first started doing this kind of write-on effect, I was animating the intersection mattes by hand, and it was a mess. Using this workflow will cut down the total time required for the project.

I have included a couple of project files for you to look at.