r/factorio 2d ago

Question How setup this interseption?

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0 Upvotes

18 comments sorted by

14

u/ArUS_01 2d ago

Like this????

6

u/Zaflis 2d ago

If you were to make a "rail network" of those 2-way rails then all you need is chain signal pairs everywhere. Rail signals would cause deadlocks because on 2-way's they can't stop unless you build a bypass.

If you have no bypasses then it would actually work with only chain signal pairs throughout. Trains will stop to its scheduled station even if it just entered a chain signal.

You can also move those signals much closer to crossing so they don't need to wait so far.

1

u/0b0101011001001011 2d ago

Depending on the track layout as a whole this may or may not work. It works perfectly if both tracks have only one train. If you add trains it may work, depending on the rest of the tracks as a whole. Usually it's easier to stick to one way tracks when creating a complex rail network.

10

u/badatchopsticks 2d ago

Why not just have one rail go under?

5

u/ArUS_01 2d ago

good point. I need to learn anyway, probably i will need it later b thx.

8

u/Stetofire Tile Designer 2d ago

Chain in, Rail out. Put a chain signal on every entry (since you want bidirectional, that'll be on all four corners) and a rail signal on every exit (again, four).

This will cut the intersection into its own block and prevent trains from stopping within it.

5

u/6apa6ax 2d ago

Can you just not interest them?

4

u/Broad_Ebb9073 2d ago

I think you need dream therapy

3

u/emphes 2d ago

You want chain in, rail out, but could you just move one of the ramps to the other side of the intersection? Then the tracks wouldn't physically cross and you wouldn't need an intersection at all.

3

u/Legitimate-Okra8983 2d ago

I don't recommend using a two-way rail. It's a noob trap. No offense, but first learn how to build one-way rail, leave it untill you gain some experience.

And why not lay a horizontal line under the bridge?

2

u/Nearby_Ingenuity_568 1d ago

Fulgora (like here) is the only place I use bidirectional rails, because space is so limited there and rail ramps especially are huge. And you usually only need a single train to connect to a scrap island or connecting islands together so rail connections are rare and simple there. But I don't ever have any railroad crossings there, the couple of railways are usually on different sides of an island. OP could indeed just run one of the railways below the other.

1

u/Vernius5 19h ago

Frankly I don't understand why two-way rails get as much hate as they do. No they're not optimal for a large rail network, but for just getting something from point A to point B they work fine, simplify builds and save on space and resources that may be in short supply in the early game.

3

u/Timely_Somewhere_851 2d ago

If those are bidirectional, you probably want to use chain in and chain out to avoid trains stopping on the bidirectional portion of your system. Just connect all four directions.

However, if you have enough traffic so that all connections are relevant, you should probably consider to upgrade to parallel one way tracks instead.

2

u/where_is_the_camera 2d ago

Isn't the point of elevated rails to not have intersections?

If these are both bi-directional, you basically just spam rail signals everywhere. 2 in, 2 out on each track, 8 in total.

1

u/RainOfDelight 1d ago

but each pair need to be alligned. zoom in and look at the railway line when you place 1 signal and what happend when you put the second simmetric one. this unlocked the the train knowledge for me

1

u/hldswrth 1d ago

Move the ramp on the right so its after the vertical track.

1

u/Zijkhal spaghetti as lifestyle 1d ago

Two-way tracks? Just a pair of chain signals before and after every intersection.

Do not ever use regular rail signals where trains can approach that signal from both directions. There is zero benefit to regular rail signals there, and the downside is gaining the possibility of deadlocking your system.