3 and 4 way intersections

Smart setups of railway stations, intelligent routing, solutions to complex train-routing problems.
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SavageVector
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Re: 3 and 4 way intersections

Post by SavageVector »

SavageVector wrote: Wed Jan 15, 2025 10:34 am Hi! I have literally no idea what I'm doing, but I made a 4-lane 4-way RHT intersection. I run 2-8 trains which locks up a lot of elevated 4-lanes I've seen, and my city block size is only 256, which removes most of the rest. I really wanted an intersection with no crossings, so just did my best. Looks pretty messy, and I have no idea how to do rail signals on an intersection without crossings; but I think it works okay?

I call this one the Vector V2 (you don't want to see the first) because I'm uncreative and vain. I don't like that it's taller than wide, and it could use a little cleaning up on some curves; but since this is my first ever 4-lane 4-way in general, I'm just gonna call it good enough.
Edit: I just noticed that my 2-way symmetrical intersection has 225 rail signals. Okay, it is no longer good enough...

2-4-0: 197.37 TPM
2-8-0: 128.96 TPM

01-15-2025, 05-19-49.png

Made the Vector version 3. Squared it up by getting the height 12 tiles shorter, while also giving the overall intersection an ever so slightly thinner footprint. Added some (atrociously spaced) roboports and electric poles. Put slightly more care into signals, cutting back by like 10% with negligible impact on TPM, although I still have no real idea what I'm doing.
01-18-2025, 06-33-47.png
01-18-2025, 06-33-47.png (933.62 KiB) Viewed 471 times
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solublefish
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Re: 3 and 4 way intersections

Post by solublefish »

After much fiddling, I fit my Celtic Turbine hybrid into 128x128 (4 chunks square). It tests around 200 TPM with 2-4 trains.
01-22-2025, 05-37-08.png
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Notes:
- It's still really two overlapping 2-lane interchanges. This makes it easy to upgrade from a 2-lane to a 4-lane system. But there's no lane changing inside - I do that on straights anyway.
- The inner part is still basically Bocian's Celtic Knot. The narrow profile makes it a good fit without sacrificing TPM.
- Here's a quick 3-leg variant.
01-22-2025, 05-40-58.png
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- The 2-lane turbine may be useful in its own right. Again it's upgradable to 4 lanes just by inserting a Celtic Knot. But also its TPM is decent for the footprint (~105 / 128x128), and the center is big enough to put a load of useful stuff in.
01-22-2025, 07-33-41.png
01-22-2025, 07-33-41.png (6.91 MiB) Viewed 332 times

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Maeximus
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Re: 3 and 4 way intersections

Post by Maeximus »

I made a elevated version of HansJoachim's 4 way intersection "simple": https://factoriobin.com/post/buqn83
I have no idea how these things work but they look exactly the same signal block wise so I would assume the numbers are the same (even though I have not tested it)
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enthusiast
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Re: 3 and 4 way intersections

Post by enthusiast »

A simple intersection that does not use elevated rails and is surprisingly effective.

The 2-4 train version scored 80.83.


The 1-4 train version scored 68.17:

simplebuffered.png
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Factoriointersection
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Re: 3 and 4 way intersections

Post by Factoriointersection »

Great! Updated the forum post=)
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