How do I hold up soil that makes my grade? NEED HELP

Garden Railroading
1

OK didnt know how to word the question but what should I do to hold up track that is on a grade. I am re-building my layout into a figure 8. Should I use wood, concrete, ballast? An ysuggestions would be helpful

2

You can use bricks or blocks.
You can use wood retaining walls.
Or, you can bix your rocks and ballast with Portland Cement, spread it and wet it and wait.
I use all three.
TOC

3

Bridgemasters sells retaining walls that might to the job.