90° turns

[jamespetts]

Ocvavius: that is a very interesting analysis: the important part being the temporary blockage of the optimum route by a departing train. I have just committed a change prohibiting routing over orthogonal V-turns by convoys under direction of a choose signal, without interfering with their use on a normal route (where the temporary blockage is not relevant).

I hope that this is helpful.

[Vladki]

but that green route is a series of two 180° turns with r=0.5 tiles, isn't it?

Sure they are, and should be treated as such.  Some paksets have graphics that show it like that.
Perhaps it could be an option like in TTD to forbid such turns. Sometimes they are useful, but I have also experienced similar problems with choose signals, when trains took very funny paths.

[jamespetts]

Have you ever had problems relating to this other than with choose signals? I ask because I have amended the code so that convoys cannot route through these turns when using an alternative route from a choose signal.

[Vladki]

Have you ever had problems relating to this other than with choose signals? I ask because I have amended the code so that convoys cannot route through these turns when using an alternative route from a choose signal.

No, other problems. On the other hand, I sometimes used such turns on purpose to turn the train back (after un/loading).

[Rollmaterial]

Convoys are still routed over V-turns to alternative platforms for me.

[jamespetts]

Convoys are still routed over V-turns to alternative platforms for me.

Can you give a specific example of the particular circumstances in which this occurs so that I can test it?

[Rollmaterial]

https://www.dropbox.com/s/jdhrajfy9n9d7yv/V%20turn.png?dl=0
Siding 1 has an end of choose signal and convoy A has siding 2 as default. It arrived while another train was leaving siding 4 and was routed there as soon as the path visible in the picture was clear.

[jamespetts]

Can you upload a saved game in which this can be reproduced? That makes it much easier for me to track down the issue.