Star Junction

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[[Image:Star junction.png|none|frame|Star junction (bridges)]]
[[Image:Star junction.png|none|frame|Star junction (bridges)]]
[[Image:Star junction 2.png|none|frame|Star junction (tunnels)]]
[[Image:Star junction 2.png|none|thumb|200px|Star junction (tunnels)]]

Revision as of 22:19, 6 January 2008

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
Complex Star
High Speed 4-Way Fly-over/under
Pre-Signaled Roundabout
Advanced Roundabout
Right-of-way Roundabout
Improved Roundabout
Deepblue2k8 4-way Junction

Enormous junctions

Multi-way/multi-track cloverleaves
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

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

The Star Junction is arguably the best known 4-way junction. All merges occur after all exits (no gridlock), all directions are treated equally, it is small with no sharp turns, and is fairly simple to build.

Star junction (bridges)
Star junction (tunnels)


  • Handle a large number of trains at a time.
  • Paths split before they merge.
  • Won't cause traffic jams.
  • Not difficult to build
  • Small compared to other bridged 4-way junctions.


  • Some branches are shorter than others, which may cause some trains to wait unnecessarily.


  • Start by building the bridges or tunnels.
  • Resize to make each branch long enough to hold a complete train.
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