I have just been introduced to Path Based Signalling (referred to as PBS) by a friend, and no matter how much I read I can't seem to figure out how to get a station to work properly which has trains coming in from both sides.

I have ended up with using Path Signal behind each platform entrance to 'terminate' the reserved train paths to allow other trains to reserve a path across the signal block. I have included a screenshot to better illustrate my current way of working with these new signals.

I have circled the One-Way Path Signals to highlight them.

OpenTTD dual-sided PBS station

As you can see, this setup works okay as the first trains reserved path is terminated allowing the second train (grain/livestock) to enter the station.

I'd like to know is this optimal, or even correct usage of these signals?

1 Answer 1


You are on the right track (pun not intended).

There are just a few minor improvements you can make to this station:

  • It doesn't seem like there is a way for your left most track to actually reach the 'out' line at the bottom right of the screen without going through a lot of bends.
  • Its not optimal to have both the in and out lines share a common path as that can cause a lot of backup, especially if you have a slow train.
  • Avoid unnecessary turns in your tracks as that causes slowdown as well.

My favorite type of station to use is a "Ro-Ro" station where trains entering and leaving don't interfere with each other.

This is the simplest version to build and easiest to extend to whatever size station you want:

station image
(source: openttd.org)

The same concept can also be applied to dual sided stations:

station image 2
(source: openttd.org)

  • Wow, I was hoping for a simpler solution, but I do understand how this works. I'm still not sure why there are only one-way signals on one side of the station, as it looks like trains could us both sides?
    – Neon1024
    Apr 24, 2013 at 14:08
  • @davidyell sometimes you only have one side to work with, such as deep inside a city where you can't afford to have a dual sided staton
    – l I
    Apr 24, 2013 at 15:01
  • I'm keen to understand why in the blue station there are dual sided signals on the NE side of the station, but only single signals on the SW side.
    – Neon1024
    Apr 25, 2013 at 10:34
  • If there is a savegame with this setup that I can look at - that would be epic!
    – Neon1024
    Apr 25, 2013 at 10:42
  • 1
    @DavidYell i made a quicky example with 2 roros, you can get it here: s000.tinyupload.com/index.php?file_id=37173294977205686476
    – l I
    Apr 25, 2013 at 14:14

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