As I started to run trains on the outside tracks, I realized that, at a certain location, the two tracks were too close to each other. To prevent crossing trains from bumping into each other, I had to adjust a small section of tracks.
This is the section creating an issue:
I removed the rails:
I decided to remove the trackbed:
And install a new clean trackbed:
Sadly, I only had concrete sleepers rail, but this will do it:
Next, I have to put back sleepers under the rails where I made electric connections or joiners.