What am I missing about the path signs? Or is it some sort of a bug? Because from my understanding, this design should work just fine. If I remove the marked sign, trains #3, #10 and #4 will pass the stopped train successfully. The standard and pre-signals instead only allow one train into a block at any one time. As their name suggests, path signals operate using trains' paths, and will allow multiple trains into a block as long as their paths do not intersect. Sometimes they pass the stopped train successfully, but most of the time they get stuck. level 1 nivlark 7y First, a definition: a signal block is all the connected track between two signals. But in my example, the sign that is pointed by the red arrow prevents other trains to reserve a section on the middle track. It is important that the train gap (not SD) of straight and diagonal tracks is as similar as possible. As I understand from the path signal descriptions, it should allow traffic from its back side. In OpenTTD, trains move slower on angled track (thanks SmatZ), and thus require an increased signal density to prevent bottlenecks. On the screenshot, I stopped Train11 and others got stuck behind it (I expected them to use a middle track to pass the obstacle). On the middle track, I use regular path signals to allow any direction on it. I wanted to use one-way path signals on side tracks to ensure a single direction on them. 2 tracks for both directions and a shared track in between which can be used in both directions for passing slower traffic on "main tracks". You could do this only inside the signal look-ahead distance but this creates the risk of inconsistent pathfinding.I'm trying to build a two-way railroad with 3 tracks. VT does not have this special case, and trains will not pass a red chain signal even if they do not need a path through an occupied block. The trouble with this is that it makes the track cost a function of the instantaneous state of the vehicle which is problematic for the segment cost caching which is used outside of the signal look-ahead distance. So, I think there should be two different station penalties Path signals will thus take into account where trains currently are. To make this work the cost of the centre track is artificially made more expensive than the cost via the platform but less expensive than the cost via the platform when occupied. Path signals (the type in front of your station) have an exception: they will allow more trains in as long as the incoming train does not share a path with any trains currently within its block. I happen to use a similar layout frequently in my own games, except that going via the platforms is the normal path, and the centre track is only used for bypassing trains when the platform is occupied. The problem here is that the cumulative rail_pbs_cross_penalty cost of the occupied centre track is too small to make the centre path more expensive than going via the platform. As station platforms are always reserved either not at all or in their entirety, the total penalty is proportional to the platform length, and is predictable. Rail_pbs_station_penalty is the per-tile for a reserved station tile. Especially with the 6 different signals available in OpenTTD, this can seem very challenging. In order to do so, one has to make use of the available signals. In this type of layout, if you are unlucky you could have different behaviour for short trains blocking the middle track than for long ones. OpenTTD Signals explained - a guide One of the greatest features of Transport Tycoon Deluxe and OpenTTD is the ability to create sophisticated railroad systems. In many cases the total cost is different depending on how long the train is and how far away it is from the signal it is approaching. Rail_pbs_cross_penalty is the per-tile penalty for a reserved non-station tile. Rail_pbs_cross_penalty and rail_pbs_station_penalty. Now block signals should be activated in the game. Change the 'Show signal types' setting to 'Show all settings'. Change the category to 'Expert (show all settings)'. To follow on from earlier comments, there are two further YAPF penalties which need to be considered for this type of layout: In the main screen of the game, click on 'settings' 2.
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