[spoiler=No left]Blueprint string: [url=https://pastebin.com/dXKfgZit]Right hand drive[/url]
Throughput: Set 1: 56 Set 2: 59
Deadlock notes: Can deadlock if the intersection gets saturated, needs a lot of trains to do that though.
Scaling notes: all buffers should be scaled for longest train, posted is 6-car
Version tested: 0.17.43
Original by: [url=https://forums.factorio.com/viewtopic.php?f=194&t=46855&start=320#p318530]Jap2.0[/url]
[img]https://i.imgur.com/iH4yrhV.png[/img][/spoiler]
[spoiler=Double wide bubble cross]Blueprint string: [url=https://pastebin.com/yQiRUVkw]Left hand drive[/url]
Throughput: Set 1: 41 Set 2: 47
Deadlock notes: While it can deadlock with regular traffic this one is really stable, should be comparable to A or B rated
Scaling notes: All buffers need to be scaled for largest train, inner circle need to be larger than longest train to avoid crashes
Version tested: 0.17.43
Original by: [url=https://forums.factorio.com/viewtopic.php?f=194&t=46855&start=60#p276423]FrodoOf9Fingers[/url] (this variant via PM)
[img]http://i.imgur.com/FolouoR.jpg[/img][/spoiler]



Cicuitry
[spoiler=Magic-roundabout]Blueprint string: [url=https://pastebin.com/Da9BcMXV]Right hand drive[/url]
Throughput: Set 1: 73 Set 2: 68
Deadlock notes: Multiple circles that can be saturated and deadlock. The circuitry makes it mostly safe though.
Scaling notes: All the buffers need to be adjusted to fit the longest trains, posted is 6 car
Version tested: 0.15.37
Original by: [url=https://forums.factorio.com/viewtopic.php?f=194&t=46855&start=280#p311759]ERJHolton[/url]
[img]https://i.imgur.com/rLf4KCi.png[/img][/spoiler]
[spoiler=Priority roundabout]Blueprint string: [url=https://pastebin.com/0uGFHuj5]Right hand drive[/url]
Throughput: Set 1: 49 Set 2: 59
Deadlock notes: While I cannot garuantee that the circle cannot be saturated the circuitry makes this design very stable.
Scaling notes: The more trains that can fit on the circle the better it will perform. If only a few trains can fit on the cricle the risk of deadlocks rapidly increases.
Version tested: 0.15.37
Original by: [url=https://forums.factorio.com/viewtopic.php?f=194&t=46855&start=280#p311923]ERJHolton[/url]
[img]https://i.imgur.com/K5YAJiX.png[/img][/spoiler]