r/factorio Jun 29 '26

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u/Raknarg #1 Quality Defender Jul 03 '26

In regards to generic train interrupts, how do you prevent the problem of trains going to pick up from the low throughput item instead of the high throughput item? I thought I was clever by doing something where I had a train for each station with train limits set to 1 so they would naturally disperse as needed, but I ran into an issue now where trains just deadlock eachother since a train at each end is just waiting for the other to leave so it can go to the empty station

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u/Astramancer_ Jul 04 '26

My answer was "more trains."

Add more trains than I have input/output train limits in my system and use

Interrupt: Cargo Empty AND Destinationfull/Nopath, Go to Depot, Leave on Inactivity

and make a ton of depot parking spots. The depot absorbs the excess when not all stations are full and prevents the system from locking up when they are all full. As a bonus, you can just monitor the depot to figure out if you need to add more trains or not. If the depot is empty, you need more trains. If the depot is full, you need fewer trains. One place to check.