OpenTTD Manual
Installation · Tutorial
FAQ · Game Interface
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
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
3/4ths junction
Ultimate 3-way junction for 4 tracks

This type of junction is good in the respect that it has a high capacity, but it's no good for hilly or cluttered areas because of the large amount of land it requires.

Cloverleaf junction

Junction Criteria
Construction DifficultyEasy
Broken down trains only affect the one track and left turns.
Sharpest Turn1
Split Before MergeNo
Direct PathsNo
Natural TurnsYes
Signal type Basic
  • Can handle 4+ trains at a time.
  • Takes up a large amount of space when built without sharp corners.
  • Make the loop and diagonal branches longer than your trains, so the main line is not blocked by a waiting train.
  • Use tunnels if the bridges slow down your trains.
  • If necessary, upgrade to an Over-Under junction.
  • Area: 10 x 10
  • To be able to fully store a 12 length (6 grid spaces) train in each left turn movement, use a length of 2 for each side of the cloverleaf and start the cloverleaf 3 spaces away from the center intersection
  • In general, the storage space of each cloverleaf is 7*n for a size n cloverleaf, where n is the length of each side in the leaf (start size n cloverleaf at 2*n-1 spaces away from the center intersection)

Cloverleaf junction with tunnels instead of bridges

Tunnel cloverleaf with the corners on the inner side rather than the outer side of the junction.

External links