LBR Mainlines

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by OwenS


LBR Mainlines are arranged in a 3x1 configuration, of:

Left | Bidirectional | Right

Current stage: Research complete


  • Takes up less track than an LL_RR mainline and can be compressed more
  • Downgrades to LR more easily where needed
  • Allows both over and undertaking
  • Very easy to upgrade to L_L_R_R in future (Although the junction limitations remain)


  • More complex signalling
  • Probable lower capacity than LL_RR (This has itself never been tested
  • Junction positions are restricted

Minimum width: 5 tiles: Primarily (L__B__R), Connectors (L_L_R_R)

R&D Overview
Idea Player Draft of idea Testing Completed Remarks
LBR Mainlines OwenS Done Done Done Suitable and works well for moderate traffic
L_L_R_R Overtaking Mainlines OwenS Done Done Done Works well for high volumes of traffic
Multi speed trains with LBR and L_L_R_R Mainlines OwenS Done Done Done Works well with closely spaced overtaking points

Initial Observation Log

29th July 2006

With some signalling tweaks, trains are using it to overtake. They are also, however, using it to cut corners. Cheeky trains.... We do not have enough traffic to determine it it's complexity and additional size will pay off.

Also, I am adding a new peice of work to go with this: Determine if, using the LBR system, it is possible to run differing speed trains on the same network without aversely affecting the faster train's speed. Currently, we have several different speed locomotive sets:

  • ICE-3: Fastest
  • ICE-1: Seccond fastest (Used to GOB, since it was originally just the town drop)
  • BR182: Electrified freighter
  • ICE-TD: To TNT, which isn't electrified
  • DE-AC33C: For non-electrified freight

Currently, there are no noticable problems with this configuration.

We have also developed the first junction for this design.

Final observation

This system did allow overtaking, but some things should be specially noted:

  • Closer diverging points should exist, since trains can wait a while or stop
  • L_L_R_R should be done and is easily possible in busy points of the network
  • LBR (L__B__R) is easily upgradable to L_L_R_R when there isn't stuff in the way

Overall, it allowed a higher volume of traffic than a normal LR mainline would have handled. It in comparison to an LL_RR mainline has not been done; However it could be assumed that with well designed junctions it would be similar. Look at the Savegame to observe our first implementation

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  • This page was last modified on 21 August 2006, at 12:36.