Yeah that tripped me up for a bit too. I colored my 1 m foundations so the top was Red for towards my home base and Green was for away. So I could follow the IALA region b red right returning guidance
I also use two blueprints for my rail construction that I alternate with to help make things flow
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that has rails and rail signals built in
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one that’s just foundation
It sounds like you are well on your way! Please feel free to ignore the rest of this post, I’m only writing in case it helps someone else one day.
I’m sorry that I didn’t explain that my redundancy against that problem which was that I made the blueprints in the shape of an “L” from above where I always knew as I was building away from my base that the _1 m foundation part of the L shape was always to my characters right as I was facing down the | part of the L. I could clearly spot whenever the track was wrong when the spacing between _ foundations was off
I didn’t care that it made the track look a little funky, and never really had times where the train rails would meet outside of the main hub base.