Deepblue2k8 4-way 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

An easy 4-way junction named after Deepblue2k8, a user on the tt-forums who posted it there: [1]

A straight forward basic 4 way junction.

Pros

  • Just 2 turns for direction change with enough space between them.
  • Branch before merge
  • Easy to build

Cons

  • Branches have different length
  • Takes up large amount of space
  • Many bridges

Improvement

Using both bridges and tunnels, we can reduce the number of hills for the trains, so that each train has at most one up-hill.

Modification of the juction to reduce the number of hills, using both bridges and tunnels.
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