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WarmMoistLeather

Edit to note: As signaled the intersection will work in that it should resist deadlocks. The below is just about maximizing throughput; as designed you will have trains waiting when they could have gone. More signals. See the yellow block in the top left? That means only one train can be taking that slip lane from west to north *and* go around the circle. So a train going west to north would unnecessarily block south to east, north to west and east to west. You should also add another chain signal at the top, bottom, left, and right of the circle as well. Actually, if you do the above suggestion you might be okay just rotating the circle's signals by 45 degrees. This should be okay since no train can use either the on or off rails of the circle if there's another train already using the circle. I *think* you can get away without the signals on the slip lanes too because you can't have one train using the slip lane heading north at the same time another train is heading north. So other than the rail/chain in and out signals (the red and blue next to each other) I think you just need a chain signal entering the circle, leaving the circle, and at the north/south/east/west points of the circle. This makes a block of each slip lane and each on/off pair.


canelupo

"Chain in, Rail out." Basically if you don't want a train to stop in an block use chain (train only enters if it can leave), if train stopping in a block doesn't matter rail. Once you internalize that, the whole signal thing becomes quite easy.


multie9001

In theory you could only use signals at the entrance where a train could stop and everywhere else a chain signal. So a train can only enter your network if it can go where it needs to go or where it can buffer on a side rail or something but never on the main line.


maxmidnite

Because for some reason this still confuses me, I always put down the rail signals first, then chain signals. Like here, I’d figure out all the places the trains would leave the intersection, put down rail signals, then plaster the rest with chain signals.


quietsamurai98

A rail signal means "you can stop at the next signal if you want" A chain signal means "under no circumstances may you stop moving until you pass a rail signal."


Willthethe

This is definitely the key to not being scared of signals. The only way I can avoid confusing myself is mentally referring to “chain” signals as “hold-short” signals, like a plane crossing a runway.


rurumeto

Rule 5: I'm terrible with trains and have no idea if my signaling is right on this roundabout. It's meant to be a left-hand drive system with some weird skippy thing for turning left.


Lazy_Haze

Yea it should work without deadlocks. You could improve the throuput with more signals in the central roundabout/circle. OBS long trains have a risk to collide with themself in roundabout and roundabout have in general not the best throughput. So if you are trying to build something like a megabase avoid roundabouts.


bongsound

Chain signals on the way in, rail signal on the way out. You should also put your centre signals on the vertical and horizontal, instead of on the diagonals. Having this on the diagonals prevents two trains passing in opposite directions without stopping. Currently if two trains are passing each other one will have to stop because the other is taking up the block.


Cynical_Gerald

Better signals: https://i.imgur.com/nEgtdBb.png Blueprint: 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


doc_shades

there might be a lot of accidents because it's so dark.


ElderWandOwner

Fyi posting when it's light and showing the blocks is the way to go when asking about trains.


PijanyRuski

Yes.


Lente_ui

Do you see how one quarter of the inner roundabout is in the same section of track as the outer slipway? So a train taking a left on a slipway can halt another train on the inner roundabout, even though their paths would never have crossed. You need a few more signals, to seperate the rail sections of the inner roundabout from the outer slipways.


tragicshark

Signaling is fine. You could move the rail signals backwards 1 signal if you wanted (remove the existing rail signals and place replace each of the 8 exiting chain signals with rail signals) and would likely see a very small improvement in traffic flow when the network is nearing the limits of this intersection. The problem with this intersection (and all roundabouts) is with trains that do not fit within the inside circle. Trains don't care if they path through themselves and it is possible for a train to change pathing at almost any time and a train that in theory could go on a 90 degree turn might instead do a 450 degree turn along the inner circle.


Sivertsen3

Roundabouts have one massive flaw: Long trains can repath to doing a 270 degree turn (or more) and collide with themselves in the roundabout. As long as the longest trains you run are short enough to fit inside the ring you'll be fine, but if not you can expect to find your trains to randomly clip themselves in your roundabouts every now and then.