DO's trucks stuck with residual cargo.

[Aberro]

Distribution office trucks sometimes couldn't unload fully and they just return to DO, and then just sits there until I'd notice that either production has stopped or shops left without food.
Could you maybe make DO's orders to wait until unloaded? Or return where they've loaded and unload residual cargo there? Or at the very least just drop it, it's still better than just being stuck at DO doing nothing.

[kyonkun]

Don't use a DO and a line to supply the same goods to the same building.
Don't use multiple DOs to supply the same goods to the same building.
Don't use DOs to supply the Rail Construction Office.

If you follow these rules, you should never have residual cargo in your DO vehicles (tell me if I missed any). You can break the rules if you use vehicles with small capacity compared to the warehouse capacity and destination %, such that there will always be space to unload a full load, but that's marginally more complex than just following them.

One of the primary benefits of a DO, its reason for being, is that by design it won't ever need to wait to unload (if used properly e.g. following the above rules), thereby keeping the vehicle (and the parking spot) free for other tasks, so I can't imagine incorporating a "feature" to deliberately make them wait. Just use a line if that's the behavior you desire.

[Aberro]

Originally posted by kyonkun:

Don't use a DO and a line to supply the same goods to the same building.
Don't use multiple DOs to supply the same goods to the same building.
Don't use DOs to supply the Rail Construction Office.

Well, in other cases I wouldn't be so sure, but I had at least one case where I am 100% positively sure that I don't supply same building with anything except a single DO. And yet, it stuck. A DO that have only three points - the customs (for meat), the warehouse (for everything else) and the shop. The shop that supplied only by this DO.

[SimoGlass]

Usually trucks with remaining cargo are supposed to wait in the office until the % storage for the recipient(s) passes the threshold, after which it just sends the truck to the destination without picking up anything first.

If they're just sitting there waiting it would most likely mean the related shop is already full on whatever that product is. Usually they don't pick up enough to have leftovers after the delivery, the only way I've seen that happen is when other delivery services make drop-offs while the DO truck in in transit.

Some screenshots might help illustrate what's happening better.

[Cheet4h]

Originally posted by Aberro:

A DO that have only three points - the customs (for meat), the warehouse (for everything else) and the shop. The shop that supplied only by this DO.

Did you have auto-purchase enabled for the shop? That way the DO might have bought resources that were covered by auto-purchase by the time the truck arrived at the shop.

[Aberro]

Originally posted by Cheet4h:

Did you have auto-purchase enabled for the shop? That way the DO might have bought resources that were covered by auto-purchase by the time the truck arrived at the shop.

Nope.

[Aberro]

Originally posted by simoglass:

Usually trucks with remaining cargo are supposed to wait in the office until the % storage for the recipient(s) passes the threshold

And that's probably the issue. I have only one general cargo truck. Which is sitting, waiting for clothing to go empty, so it can go grab some food.

[moron_with_a_gun]

I have noticed this a lot more with rail distribution offices. More frustrating of all, trains don't seem to take the wagons with the cargo being requested which are already filled or partially filled in the DO which can lead to a lot full of partial loads of gravel or coal.