How do you set up multiple trains running on the same track, using sideline rails (I don't know what the proper terminology for those sections of railroad is)? What signals would you use and how?
Thanks.
How to set up 2 or more trains running on the same track
openttd
Related Solutions
In this case I used @yx's advice and employed one-way path signals. Still not sure why the exit/entry signals weren't working as intended.
The signals in front of the station needs to be exit pre-signals.
You're currently using normal block signals, which means that the entry pre-signals should find no valid exit pre-signals, and will act like normal block signals, and thus be green since no train is occupying the next section of track. The trains should not recognise the tunnels as valid exits, since, as you mentioned, they are one-way signals.
You can find out more about pre-signals by reading the wiki: http://wiki.openttd.org/Path_signal#Pre-signals
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Best Answer
By "sideline rail", I assume you mean a passing loop. The easiest way to do it is like this:
The passing section is as long as the longest train on the track, plus one tile for the signal. One-way path-based signals at the exits from the passing loop ensure that each section of track has only one train on it. You can extend this layout to handle more trains by adding more passing loops: one loop for each train.
Depending on timing, you may occasionally have two trains in the section with the depot: one in the station, and one heading to or from the depot. This isn't a safety problem: the path-based signaling system ensures that only one of the two trains is moving at a time.