And I tried to develop separated rail system. It works well. Currently the green circuit is the bottleneck (9k/min).
Below is the factory at 100hours. Every single rail system only handle 1 type of resource.
The central base is at the top right of the map. Power input at the bottom left. Biter nests affected by pollution clouds had been cleared by turret-creep.
Screenshot.
Train overview. Each train only run between 2 stations.
Loading station for furnace
Unloading station for furnace
The design for the green circuit factory is to be revised, planning to create another base south of the map and abandon this starting area.
I would like to know if anyone else is using separated rail system.