Unfortunatly, it look like the exact same as viewtopic.php?p=623353#p623353 which deadlock the test with current signaling.Meorin wrote: Wed Apr 23, 2025 6:33 pm Took me 2 hours of trial and error, just to end up at a cloverleaf interchange, but since it wasn't posted before, here we go:
Benefits: very few elevated rails and u-turn, exactly what I wanted for my first train setup.
3 and 4 way intersections
Re: 3 and 4 way intersections
Re: 3 and 4 way intersections
Damn it. Didn't see that one. Mine is very close but not the same. Got 8 more signals and with those extra signals it just went through a 1000min test without getting into a deadlock (LHT). You had me paranoid those 2 hours ended up in a flawed design but looks good to me still. Will test RHT for 1000min as well, just to be sure.mmmPI wrote: Wed Apr 23, 2025 7:26 pmUnfortunatly, it look like the exact same as viewtopic.php?p=623353#p623353 which deadlock the test with current signaling.Meorin wrote: Wed Apr 23, 2025 6:33 pm Took me 2 hours of trial and error, just to end up at a cloverleaf interchange, but since it wasn't posted before, here we go:
Benefits: very few elevated rails and u-turn, exactly what I wanted for my first train setup.
Re: 3 and 4 way intersections
Maybe because there is only the set 1 ?Meorin wrote: Wed Apr 23, 2025 8:18 pm Damn it. Didn't see that one. Mine is very close but not the same. Got 8 more signals and with those extra signals it just went through a 1000min test without getting into a deadlock (LHT). You had me paranoid those 2 hours ended up in a flawed design but looks good to me still. Will test RHT for 1000min as well, just to be sure.
Re: 3 and 4 way intersections
I doubt that running only set one caused the lack of deadlocks. (I tested a couple of different LHD cloverleaf designs earlier today, and both deadlocked on set one within 90 minutes. But my designs didn't have all those extra signals).
Here is what a potential deadlock situation looks like. (Handcrafted. It is possible that the timings in the testbed never actually line up to produce this particular situation. But theoretically it could happen).Meorin wrote: Wed Apr 23, 2025 8:18 pm Got 8 more signals and with those extra signals it just went through a 1000min test without getting into a deadlock (LHT).
- Screenshot 2025-05-21 053540.png (881.16 KiB) Viewed 1249 times
Re: 3 and 4 way intersections
It would be hard to believe that a full test doesn't yield a deadlock , or it would mean the test needs to be refined imo, because without chain signals and proper 2-4 trains my tests on linked bp resulted in deadlock all the time. So i thought maybe an old version of the test that was only done with trains coming from "some" direction that would be different for set 1 and 2 and 3 could have lead to a result with with only set 1 no deadlock occured.Zavian wrote: Tue May 20, 2025 7:45 pmI doubt that running only set one caused the lack of deadlocks. (I tested a couple of different LHD cloverleaf designs earlier today, and both deadlocked on set one within 90 minutes. But my designs didn't have all those extra signals).
Re: 3 and 4 way intersections
It's obviously bad for longer trains, which this thread is clearly focused on, but I would like to at least document the humble roundabout. It's not megabase worthy, but I like to do smaller-scale grid-based stuff for easy supply chain management with 1-1 trains, so it's very useful to know about for someone like me.
After some testing and tweaking, I can conclude:
After some testing and tweaking, I can conclude:
- Works decently for 1-1 trains
- Functional for 1-2 trains, but noticeably slower
- Deadlocks on anything longer
- Deadlocks can be worked around by turning all the inner signals into chain signals, at a cost of overall throughput
Last edited by dryvnt on Sun Jun 01, 2025 3:49 pm, edited 11 times in total.
Re: 3 and 4 way intersections
Oh no, I seem to have had mods enabled (K2) that changed the results a bit. I apologize, that is my mistake for being inattentive. I have removed the misleading data from my post above. Here are some more accurate results for the humble roundabout:
1-1 score: 58.76 (90-min test)
1-1-1 score: 38.55 (90-min test)
1-3 score: 27.61 (modified signals, 30-min test)
Seeing how the results scale, I decided it wasn't worth investigating larger train sizes. The numbers are clear: The humble roundabout is obviously only worth considering for 1-1 trains, but specifically for 1-1 trains it performs very impressively for its footprint IMO.
1-1 score: 58.76 (90-min test)
1-1-1 score: 38.55 (90-min test)
1-3 score: 27.61 (modified signals, 30-min test)
Seeing how the results scale, I decided it wasn't worth investigating larger train sizes. The numbers are clear: The humble roundabout is obviously only worth considering for 1-1 trains, but specifically for 1-1 trains it performs very impressively for its footprint IMO.
- 06-01-2025, 17-36-04.png (970.42 KiB) Viewed 851 times
Re: 3 and 4 way intersections
3-Way / 2Lane / Elevated
highest score 87.77
The average TPM is 86 ~ 87
increased traffic by controlling the signal circuit
https://factoriobin.com/post/rij5jy
highest score 87.77
The average TPM is 86 ~ 87
increased traffic by controlling the signal circuit
https://factoriobin.com/post/rij5jy
- 06-20-2025, 08-43-31.png (693.5 KiB) Viewed 175 times
Last edited by Taso4784 on Thu Jun 19, 2025 11:54 pm, edited 1 time in total.
Re: 3 and 4 way intersections
3-Way / 2Lane / One plane
It's a very simple design, but it improves traffic by adding and optimizing signals
Average score 41~42
https://factoriobin.com/post/bz5ndy
It's a very simple design, but it improves traffic by adding and optimizing signals
Average score 41~42
https://factoriobin.com/post/bz5ndy
- 06-20-2025, 08-51-11.png (443.44 KiB) Viewed 173 times
Re: 3 and 4 way intersections
Hi, this is for a 1-2-1 train, or any train that is 4 total in length, I suppose. Size is 96 x 96
I don't have a lot of experience making intersections, so maybe this isn't perfect. I'm open to input/suggestions, or if somebody else wants to improve it that is fine too. I came up with this on my own and realized it looks a lot like another 4-way posted here after I had already made it.
I don't have a lot of experience making intersections, so maybe this isn't perfect. I'm open to input/suggestions, or if somebody else wants to improve it that is fine too. I came up with this on my own and realized it looks a lot like another 4-way posted here after I had already made it.
Re: 3 and 4 way intersections
3-Way / 2Lane / One plane
Average score 62
I came up with an idea and made it
https://factoriobin.com/post/jk7ocj
Average score 62
I came up with an idea and made it
https://factoriobin.com/post/jk7ocj
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- 06-21-2025, 08-30-39.png (530.57 KiB) Viewed 74 times