This can be rotated to create big squares with 8 train stations with 1 train 4 cargo wagons. If one square is not enough you can then easily duplicate it to increase production. More images in https://imgur.com/gallery/DqSDM

Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
This can be rotated to create big squares with 8 train stations with 1 train 4 cargo wagons. If one square is not enough you can then easily duplicate it to increase production. More images in https://imgur.com/gallery/DqSDM