There's a feature that I remember seeing in simutrans, but haven't tested it in a while - if it no longer exists, please let me know.
If two linked Factories are close enough together, you can build a station covering both factories. If that station has cargo capacity, the factory that produces a good will transfer it into the station, and the one that consumes it will transfer them out, without any need for conveys.
Does this feature have a name? I couldn't figure out what to search for.
As I remember, this kind of transfer was somewhat unreliable - it wouldn't necessarily transfer the full amount of the good that could be produced by the producer and consumed by the consumer. My question is, what determines how rapidly goods will be transferred by this means? Would it go faster if the station had a larger cargo capacity?
Since the player is playing as a transport company that makes no profit on goods that move without the help of a convoy, this might seem a weird thing to be interested in. However, if the factories are that close together, you're not going to make much profit anyway, so not having to set up a convoy to serve them could be convenient.