Basic 4-Way Junction

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Railway Junctions
Junction Criteria

3-Way junctions

Basic 3-Way
Line Merge
Half Cloverleaf
Half Spaghetti
Compact 3-Way
Compact 3-Way B-M Junction
Ultimate 3-way
Half Transmogrified
Braided Junction

4-Way junctions

Basic 4-Way
Roundabout
Cloverleaf
Spaghetti
Star
Complex Star
Branch-Merge
Over-Under
Tetrathorp
High Speed 4-Way Fly-over/under
Pre-Signaled Roundabout
Advanced Roundabout
Right-of-way Roundabout
Improved Roundabout
Transmogrified
Tightlong
Deepblue2k8 4-way Junction

Enormous junctions

Double Cloverleaf
Dual Tetrathorp
Dual Transmogrified
Dual Branch-Merge
Quad Branch-Merge
Quad Tetrathorp
6-tuple Branch-Merge
8-Way Star
High Speed 4-way

Other junctions

Right-of-way Depot
Dual tunnels
Sideline U Turn
Right-of-way Lane Change
Right-of-way Merge

Track Layouts

4-Way Triple Axial
4-Way Triple Axial 2
Triple Via Mini
High Hill

Unuseful junctions

Crossover
3/4ths junction
Ultimate 3-way junction for 4 tracks

This junction is OK for small networks of 5 or so short trains.

Simplest 4-way junction


Junction Criteria
CostCheap
Construction DifficultyVery Easy
TunnelsNo
BridgesNo
Breakdowns
Broken down trains stop whole junction.
Sharpest Turn1
HillsNo
Split Before MergeNo
Direct PathsYes
Natural TurnsYes
DeadlockNo
LoopsNo
Signal type Any
  • Can only handle one train at a time. (Can be fixed using Path Signals)
  • Will cause traffic backup.



Basic 4-way junction for 5 tile long trains.


Junction Criteria
CostCheap
Construction DifficultyEasy
TunnelsOptional
BridgesOptional
Breakdowns
Broken down trains can block up to all directions except one.
Sharpest Turn4
HillsYes
Split Before MergeNo
Direct PathsYes
Natural TurnsYes
DeadlockNo
LoopsNo
Signal type PBS
  • Tunnels can be replaced with bridges, but the drawback is that signals cannot be placed on the ramp of the bridge.
  • The central track should be long enough for the longest train to fit inside. Otherwise, remove signals at the central tracks.


Pros

  • Can handle several trains at a time, thanks to Path Signals.
  • Very easy to upgrade from the simple junction described above.

Cons

  • Level track crossings still present.
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