Splitters
| Basic splitter | Fast splitter | Express splitter |- | 
The behavior of splitters looks simple at first glance. But they are not that simple. Splitters have an astonishing amount of uses.
Behavior
- splitters have two input-belt-sides and two output-belt-sides on which you can connect any transport belt or underground belt
 - splitters don't shuffle the lanes on the belts; items on the left input belt lane don't change the side to the right lane.
 
Splitting
- if two output-belts are connected, then every input-item is put alternated on one of the two output-belts. Or in other words: it is guaranteed, that the inputed items are output in a ratio of 50% on each belt.
 - if one of the output belts lane is full, then it tries to output on the other output belt. This is useful to fill belts.
 - a basic splitter can keep up with the input of one fast belt, if the two output belts are connected and empty.
 
Joining
- splitters can be used to join two belts into one. This has a much higher throughput than only side-inserting.
 - as with splitting, the belt lanes aren't mixed up.
 - when both input belts are at full capacity, then the splitter prefers the left input, or in other words: the right input is only taken to fill gaps in the left input. This can be used to priorize an item-source, for example a storage. See down!
 - Use faster splitter if you want to feed into a faster belt, because otherwise your splitter is the bottleneck!
 
Use splitter as merger/joiner instead of feeding from side
When you feed a belt from the side, the throughput is limited. With v0.7 this has been improved much, but it is also simply the fact, that you feed only onside of a belt.
Cascading of Splitters
pics at the storage