Quad Branch-Merge Junction

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<center>[[image:Sharpcorners.PNG|center|none|thumb|Figure B.]]</center>
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[[Category:Train Junctions]]
[[Category:Train Junctions]]

Revision as of 01:17, 6 June 2007

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

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

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

The Quad Branch-Merge Junction is the direct evolution of the Branch-Merge Junction and Dual Branch-Merge Junction; allowing four entrances and four exits, in essence doubling the appropriation power of a Dual Branch-Merge Junction. Although still in its infancy, the quad branch-merge junction is able to handle quite a load of large trains (20 cars) with very few backups. (Figure A)

Figure A.

Speculation of angled track in the nightly builds under existing bridges will allow at least a 50% increase in train speed; eliminating eight turns that currently reduce it to below 100mph (161km/h). The sharpest turns are illustrated in Figure B:

Figure B.

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