This tutorial covers how to reduce 4 belts to 3 belts in Factorio while maintaining a balanced load.
A useful design for reducing lanes when you need to save space or reconfigure your load to fit your factory. This design will take items from 4 incoming belts and reduce it to an evenly balanced load on 3 outgoing belts. This design, like our others posted so far, does not neglect incoming belts so you don’t have to worry about backups slowing your production.