When making track changes, where is it stored?

[JSMR]

Since I find adding track so difficult - 2 hours to add 2 pieces near my sugar beets refinery - I wondered how is stored so I can revert back if I mess up the main line?
Is it just the world file corresponding to the area i'm working on and the TBD file?

Any help appreciated.

[baldwin]

Easiest way to revert is restore from a save prior to when you started work on track.

[JSMR]

Oh. Didnt know you could do that. How do you go back to a previous save in TSRE?

[oper190]

The Track Data Base, .tbd, stores just that, the track data lines that the trains follow. The world files contain the track objects placement. You have to have both in sync or you have a big mess.

[JSMR]

Makes sense. I guess I could copy the entire world files and current .tbd file as a back up for the routes current state. And keep doing that as I go along with each change I attempt to tracks and layout.

[JSMR]

Ah forget it. Too many errors. I got lucky with the 2 track sections I joined. I'll stick to adding grass and trees.