A quick-to-set-up, extensible early-game system for red and green science packs. I used this to get the "Getting on track like a pro!" achievement on a normal default map. This will also help you if you only have a few resources close to base, or if you just really like trains.
- Set it up and feed it with 2 belts: pure iron, and iron/copper
- Each section feeds into the next
- You can get started with the red science packs while you're gathering resources for the greens
- Each tile supports close to 4 labs (and can be made faster by upgrading inserters etc.)
I supplemented it with one more red science further up the belt as the greens started to come online.
Because it's reasonably minimal and extensible, this isn't just a temporary solution! Just leave enough room for your bus (across the top) and it will last you all game. And enjoy those early-game trains!