Train Minimum Fuel to Depart

Specifically, "train may not depart this station unless it has at least X fuel". Why?

Because more often than not, my first warning that my train fuel station has run out of fuel... is a train running out of fuel, which becomes a forced Unity spend, and uncertainty over exactly how many trains didn't get the fuel they wanted. This is even if I configure the feeding storages with alerts; a single T2 steam locomotive tender can fit two fuel modules worth of fuel (144 tender space, 75 max in the fuel module), so a single train can empty the last of the storage- triggering the alert- and still leave with insufficient fuel.

This applies to both lines and networks- Line stations running out of fuel will simply dispatch the train with little or no fuel, and it'll continue on its way despite still desperately needing fuel. Like this one:

(You can see the upgrade designed to solve the station exhaustion problem...)

Network trains, if I remember a previous world correctly (behavior may have changed in the versions since), run in continuous circles around the fuel station until they run out of fuel- not even attempting the work they still have to do! That does, at least, tend to mean the fuel-out trains have a predictable location, and I don't have to worry about future fuel-outs once I restore the station...

So it'd be nice if I could tell the station (or the Line) that the train isn't allowed to depart unless it has at least X amount of fuel. It could- and absolutely should- throw an alert whenever a train is waiting for that condition (and not actively fueling), though, as such would indicate a fuel shortage.

Currently in the game, you can set trains to enter the refueling station when their fuel drops below a certain level. Therefore, if you configure it so that trains need to refuel when fuel is below 50%, a train with less than 50% fuel will not leave the station. This can be set up regardless of the network or the line, unless the refueling station itself runs out of fuel

DoCoIIIMoSa wrote:

Currently in the game, you can set trains to enter the refueling station when their fuel drops below a certain level. Therefore, if you configure it so that trains need to refuel when fuel is below 50%, a train with less than 50% fuel will not leave the station. This can be set up regardless of the network or the line, unless the refueling station itself runs out of fuel

Yes, but that also bars trains above that threshold from stopping, and my current network has the fuel inline with the mainline- I want every train to top up as it passes, since they usually burn a significant fraction of their capacity throughout the length of their run, especially if they did the majority of it loaded.

Incidentally, if I did that and selected anything below about 70%, I could actually count on having fuel problems anytime something happened to tie things up. I recently had a lot of "tying up" being done via lack of maintenance (trains were breaking down), but the fuel station was full throughout so every train topped up and not a single one ran out.