Quad Tetrathorp 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
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
Building depots
Dual tunnels
Sideline U Turn
Right-of-way Lane Change
Priority 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

Quad Tetrathorp Junction is an enormous railroad junction for 8-track mainlines. Its main gimmick is the fact that all tunnels are parallel to each other.

Quad Tetrathorp junction

Quad Tetrathorp junction

Junction Criteria
CostHigh
Construction DifficultyVery Hard
TunnelsYes
BridgesNo
Breakdowns
Broken down trains only affect the one track.
Sharpest Turn2.5
HillsYes
Split Before MergeYes
Direct PathsYes
Natural TurnsYes
DeadlockNo
LoopsNo
Signal type PBS
  • Can handle large amount of traffic.