Quad Branch-Merge Junction

From OpenTTD

Railway junctions 3-Way junctions Basic 3-Way Line Merge Half Cloverleaf Half Spaghetti Compact 3-Way Compact 3-Way B-M Junction Ultimate 3-way 4-Way junctions Basic 4-Way Roundabout Cloverleaf Spaghetti Star Complex Star Branch-Merge Over-Under Tetrathorp Pre-Signaled Roundabout Advanced Roundabout Right-of-way Roundabout Enormous junctions Double Cloverleaf Dual Tetrathorp Dual Branch-Merge Quad Branch-Merge 8-Way Star Other junctions Right-of-way Depot Dual tunnels Right-of-way Lane Change Unuseful juctions Crossover 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.