Over Under 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

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

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

This junction works great under heavy load. It can be in full single or dual.

Revised: Single Bi-Directional Mainline


Junction Criteria
CostModerate
Construction DifficultyHard
TunnelsYes
BridgesOptional
Breakdowns
Broken down trains only affect the one track.
Sharpest Turn1
HillsYes
Split Before MergeYes
Direct PathsYes
Natural TurnsYes
DeadlockNo
LoopsNo
Signal type Any
  • Can handle a huge amount of traffic
  • Can be used on a mainline
  • Can be used on a dual mainline
  • Can be used on a dual isolated mainline (inside pair are separate from outside pair)
  • Recommended upgrade from Cloverleaf, if space permits
  • Area: 16 x 16


Variations

Revised: Dual Isolated Bi-Directional Mainline
  • no adaptation of single mainline needed
Revised: Dual Isolated Bi-Directional Mainline
Old: Single Bi-Directional Mainline
Old: Dual Isolated Bi-Directional Mainline
Compact version
Longer branches, no slopes on one direction. Resembles Star/Branch-Merge.
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