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herrgoda 17 Jan @ 3:17pm
Reversing trains reserving track beyond first signal while waiting
Hi there,

I have seen somewhat similar issues in other threads, but none that actually represent exactly what I have been experiencing recently. One example:

Train 700-143 (in upper platform) is stationary in a through platform, although timetabled to reverse there after about 5 minutes of wait time. It is fully in the platform and about 30 metres clear of the signal behind it (or in front of it, after reversing).

Train 700-128 (in lower platform) arrives after it on a parallel track and, after a regular through line stop on another platform, is supposed to continue, going across to the upper pair of tracks to the left, on the same track that -143 will be going 3.5 minutes after it. But -143 has already reserved the track (see left in screenshot), so -128 is stuck on a red signal, only going after -143 has left.

This game behaviour not being strange enough, if I select one track segment reserved by -143 (not editing any of it, just clicking it in "Tracks" mode, then going back), the whole track clears and -128 continues merrily on its way without any issue.

I have seen this in several locations in my game, both in terminus and through platforms. But not at all reversing locations. And in old saves of the same network, this has never happened, only now that I deleted most lines and put them in again.

Anyone got any idea what might be going on?

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3409481744

*edited screenshot
Last edited by herrgoda; 17 Jan @ 6:06pm
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Showing 1-7 of 7 comments
MirkoC407 18 Jan @ 3:02am 
You have many open routes here, unless some signals are outside the picture frame. Make sure to close all open routes by appropriate signals to avoid unwanted reservations:
- Path signals active both ways to avoid reservations for trains not supposed to use the track in such direction
- One way signals (same effect but can be located somewhere else, and they unlike path signals don't interfere with reservations in the same direction)
- balises
I am pretty sure the train in the upper platform has reserved this path to the right, trough a stump track turning there and then back from right to left through the second track from bottom, directly beside your blocked train.
#1
herrgoda 18 Jan @ 4:04am 
Thank you for having a look at my problem.

The trains follow the correct tracks in the correct direction. West of my original screenshot, there are direction markers to ensure no trains routes wrong-way. I tend to not use balises, as signals on my layout are usually no more than 500m apart.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3409709012

-143 also does not "loop around and back", the track it is on is unreserved just east of the platform.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3409708754

I use this signalling method all over the place and currently have 50 locations, where this type of reversal works fine, and 4 locations where it does not. Even more, at these locations only some lines "pre-reserve", not every line terminating at that location.

Before, the same track layout worked without a hitch with 650+ lines, it is only now that I deleted most of these lines to redo/retime them (without altering the layout) that this type of problem occurs.

Trying to get behind this, I have, using the track reservation view, noticed a train reserves a track 25m beyond the next path signal. Could this distance also be used when determining if a train is "too close" to a signal behind it when reversing the game thus assuming the train is fouling the junction and in reserving its way back because of that? -143's rear is just 20m clear of the signal in this location. Also, the first points west of the signal are just 12m away.
#2
MirkoC407 18 Jan @ 5:13am 
A good trick is sometimes to just click on the signals of the track in question in signal editor / track editor (here your upper train) and see to where a train from there can actually reserve track. A reservation does not go beyond a path signal at all, as well this usually comes from the other side through some odd loop.

If you are doing large changes and did not yet do so, sometimes the game just hooks some silly stuff to the memory. A game restart helps then.
#3
herrgoda 18 Jan @ 5:10pm 
After re-timetabling the offending line (deleting final stop and reinserting it), it now seems to work. However, I am still puzzled what exactly happened here.
#4
adlet 20 Jan @ 5:01pm 
Originally posted by herrgoda:
After re-timetabling the offending line (deleting final stop and reinserting it), it now seems to work. However, I am still puzzled what exactly happened here.

What is the reference train for the line? If longer than the actual train it is possible that the tail of the reference train could be hanging outside the platform and the signal. I believe this issue has been noted, although it does seem to be a bug.
#5
herrgoda 22 Jan @ 9:41am 
Originally posted by adlet:
What is the reference train for the line? If longer than the actual train it is possible that the tail of the reference train could be hanging outside the platform and the signal. I believe this issue has been noted, although it does seem to be a bug.

The reference train is the exact same model as the one that did the blocking, same length.
#6
adlet 22 Jan @ 9:57am 
Yeah, hard to say, glad it has worked itself out. I recently had a bizarre signaling issue happen twice where a train was blocked by another train even though its path was not getting into the other train's location. Somehow the game was adding an extra element to its path (that would have been blocked but that the train was not taking in reality). A train reset solved it, and oddly it has not happened again in many days of identical operation since.
#7
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NIMBY Rails > Bug reports > Topic Details
Date Posted: 17 Jan @ 3:17pm
Posts: 7

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