Basic 3-Way
OpenTTD Manual
Installation · Tutorial
FAQ · Game Interface
README.md
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

This type of junction is OK for small networks of about 5 short trains.

Simplest 3-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. (unless using Signals)
  • Will cause traffic backup.