Actually I was coming from the other direction, not as an idea for the lane split problem. I just observed that this would be a natural, intuitive and lightweight extension of the belt sideloading mechanism to the splitters. It would open up interesting, quirky and playful uses instead of a "so...

Hi! I would like to suggest a slight modification to splitters: one should be able to sideload them. One lane would join the input side of the splitter and the other would join the output side. This would allow for some creative and not-totally-obvious lane operations. sideload.png I think this modi...