4-way intersections: Throughput and deadlocks [image heavy]

Smart setups of railway stations, intelligent routing, solutions to complex train-routing problems.
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Re: 4-way intersections: Throughput and deadlocks [image heavy]

Postby aaargha » Tue Nov 28, 2017 7:21 pm

Finally finished my "No Gods" thing, a pro tip is to not use it when disabling stations (or at all - for sanity), I actually had to make an override to disable the instant stop stations, the path changing they caused made it too deadlock prone.
DarkElder wrote:There shouldn't be a deadlock on the outer square. It's not a big square roundabout. trains can only go straight using that outer lanes.

Also i made an OCD friendly version of the same design. That would be great if you add this one too.

Added as "Almost squareabout OCD". The possible deadlock looks like so (same a previous version), 4 trains right -> straight:
Deadlock
ASQ_deadlock.png
ASQ_deadlock.png (973.11 KiB) Viewed 170 times

Jap2.0 wrote:The "I don't know what to call this - Mk. 1"

This is somewhat of a roundabout while somewhat not. Trains can only go straight and right, but can turn around after the intersection, so a right turn can either be straight, then right or right, then straight. I have no idea if this will deadlock or how well it will do.

Added as "No left" with some signalling changes and made symmetrical. It can deadlock if the outer rings become saturated with trains, this needs a lot of trains to happen though.
gremblor wrote:I really like Tallinu's multicross design, but I run a 4-track 3-8-3 (14 car) rail network, and his blueprints for this train length are only available in 2-track form... I built a 4-lane RHD multicross scaled up to 14 car buffers, available here: https://factorioprints.com/view/-KzrTRj_P9IqOK9K8ryQ

I added this link to the existing entry as an alternative version.
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Re: 4-way intersections: Throughput and deadlocks [image heavy]

Postby Jap2.0 » Tue Nov 28, 2017 8:39 pm

Okay, thanks! I'll probably try to make an improved version eventually.
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Re: 4-way intersections: Throughput and deadlocks [image heavy]

Postby vanatteveldt » Thu Dec 07, 2017 9:19 am

I'm looking for a compact 4 to 2 lane intersection with good throughput. I have a 4 (i.e. 2+2) lane main line that branches off to 2 lane secondary lines.

I could take a 4 lane intersection and merge/split the 2 lanes to one after the junction, presumably with 1 train buffer to prevent the merging from affection the junction too badly. But I can also imagine that you can create a more compact or efficient design with only 2 lines out to the sides?

In terms of intersections, I guess the most compact+efficient 4 lane designs are "traditional" at 70 tpm (requires a lane changer before, although not a full one since the two lanes on each side are effectively a single lane due to the merge) or "christmas" at around 55 tpm, correct? Any better suggestions?

(Note: I'm using LCC trains so they should get even better throughput, but I'm not sure whether that would increase or decrease the gap between both designs)
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Re: 4-way intersections: Throughput and deadlocks [image heavy]

Postby vanatteveldt » Mon Dec 11, 2017 7:28 pm

In case anyone is interested, here is a blueprint string for 4-lane Traditional (LHD). I've not tested it in practice so it might contain signalling problems, but I think it should be OK.

image
Image


blueprint
Code: Select all
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Re: 4-way intersections: Throughput and deadlocks [image heavy]

Postby hansjoachim » Thu Dec 14, 2017 1:14 pm

Hey aaarghas! I was wondering if you possibly could make more rom on the throughput tester map? I wanted to try my intersection on the latest map, but I have to move all the spawners one/two trains length further away.
Would be awesome if you could=)
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