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ARS routes train on FL at St. Neots while booked SL

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ARS routes train on FL at St. Neots while booked SL 30/12/2017 at 12:47 #104601
Albert
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Screenshot and save attached. Loader 4.6.6, sim 4.3 (not played with different loader versions this time!).

I previously routed train 1M11 on the FL instead of SL (from Huntingdon to Biggleswade) to bypass a freight. Now, train 1P41 which is booked to go SL all the way, is also routed FL by ARS - at St. Neots. Bug?

I can just cancel the route, set an SL route and 'Make train ARS' without any problem.\

[attachment=9192]Schermafdruk van 2017-12-30 13-43-33.png[/attachment]

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Last edited: 30/12/2017 at 12:48 by Albert
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ARS routes train on FL at St. Neots while booked SL 30/12/2017 at 13:51 #104603
Peter Bennet
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If you can upload a screen grab of the open timetable that could be helpful. Remember to save without spaces in the file name.

Peter

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ARS routes train on FL at St. Neots while booked SL 30/12/2017 at 13:58 #104604
Albert
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Thanks for the quick response - here it is. From the 2017 Austerity timetable. 1P45 does the same, so I also included a screenshot of that one.




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ARS routes train on FL at St. Neots while booked SL 30/12/2017 at 15:03 #104606
Albert
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It seems to happen randomly because this train does not get routed onto the FL.

(I have recently had similar random ARS issues at Bethnal Green on the Liverpool Street sim - core code issue?)


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ARS routes train on FL at St. Neots while booked SL 30/12/2017 at 16:02 #104607
Peter Bennet
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Nothing obviously wrong with the timetable. Tested it myself with 10 trains from Connington and all ran as expected.

Peter

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ARS routes train on FL at St. Neots while booked SL 31/12/2017 at 00:56 #104631
Albert
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In this save train 2P45 (booked SL) is 'giving priority to 1A70' on the FL. Maybe you can use this save to find out what is going wrong?
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ARS routes train on FL at St. Neots while booked SL 01/01/2018 at 01:28 #104669
BarryM
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Maybe Clive will come up with an answer?

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Barry

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ARS routes train on FL at St. Neots while booked SL 03/01/2018 at 22:31 #104786
Albert
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Maybe. However, this train gets routed by ARS from the FL into platform 2 at St. Neots rather than platform 1. Then the train spontaneously becomes non-ARS after leaving the station.

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Last edited: 03/01/2018 at 22:35 by Albert
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ARS routes train on FL at St. Neots while booked SL 04/01/2018 at 08:25 #104791
VInce
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I've raised this issue before if only I could find it on the forum. I agree, its a bit non-intuitive there.

It needs to be routed as in the attached..

Vince

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Last edited: 04/01/2018 at 08:29 by VInce
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ARS routes train on FL at St. Neots while booked SL 16/08/2018 at 20:27 #111153
clive
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Albert in post 104786 said:
Maybe. However, this train gets routed by ARS from the FL into platform 2 at St. Neots rather than platform 1. Then the train spontaneously becomes non-ARS after leaving the station.
That one's correct. The "path" code at St.Neots is the track the train enters the station on, *not* the track that it travels from Huntingdon on. That's the case for nearly everything in Peterborough - it's partly because the sim dates back to before platform numbers could be used by the ARS logic.

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ARS routes train on FL at St. Neots while booked SL 18/08/2018 at 21:14 #111236
clive
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Just realized that 1P10 is a down train; I was confusing two issues.

In the down direction the path and line at St.Neots should always be the same since there are no crossovers at the exit end of the station. The ARS data looks at the path, not the line, to select the platform.

It could be made more specific, rejecting invalid combinations, but I'm not sure if that's the right thing to do.

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ARS routes train on FL at St. Neots while booked SL 19/08/2018 at 00:19 #111246
GeoffM
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clive in post 111236 said:
Just realized that 1P10 is a down train; I was confusing two issues.

In the down direction the path and line at St.Neots should always be the same since there are no crossovers at the exit end of the station. The ARS data looks at the path, not the line, to select the platform.

It could be made more specific, rejecting invalid combinations, but I'm not sure if that's the right thing to do.
While Clive is generally correct, the way the timetable planners code down trains through St. Neots requires a little different handling to the usual. They can specify a line code of FL at Sandy and then a line code of SL at St. Neots but since there are no crossovers after St. Neots the train has to cross beforehand. So in this case the ARS looks at the departing line code (SL) instead of the arriving path (FL). But not only that, it is possible to start from Sandy on the slow, cross to the fast for the bulk of the journey, then cross back to the SL just before arriving at St. Neots. Thus it would be (path SL) Sandy (line FL); (path FL) St. Neots (line SL).

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