Another Melksham slot query

Can't block SN72 as that would prevent trains heading towards Bathampton Junction!

Must admit I'd read it as a SwinDid question despite being in the Westbury section! So what you're saying is, on the Westbury sim, a train from CHippenham should be held back at SN72 instead of SN74?

However, my answer still stands - the slot wouldn't affect SN72 in real life as that would prevent main line moves towards Bathampton Junction.

I don't know if there are formal procedures, but common sense dictates that you hold a Bradford Jn-bound train back at SN72 if you have another train coming along the single line towards Chippenham.

The operation of Thingly Jn on Westbury was simplified a few iterations ago as people got Mexican's they had no control over hence the early fall-off which mitigated the point. I can revisit sometime.

As for Swindid and ARS; this is mentioned in the manual.

Peter

Doing a bit of research; I think that in the previous iteration the hollow track started on the branch so what was happening was less obvious. Someone else had the data for a while and seems to have extended the active TCs across the Junction, which I'd not noticed till now, so that maybe why it looks odd.

The operation of Swindid Sim itself should not be affected by whether there is a chain or not. I have found a discussion we had in 2009 on the matter and what you have now is what I settled on. At the moment I'm not minded to change that, though if anyone knows if the ARS at the new box (I assume it has ARS) is coded specially (and if so how) then I'd be happy to revisit.

Peter

By the way, can you point me in the direction of the Swindid discussion that took place in 2009 so I can have a look at the various suggestions made?

Lyn

Regarding ARS at Thingley in the Swindid sim (when chained to Westbury), I was wondering whether the ARS system would move a train to signal SN74 if it was due to travel along the Branch but the slot had not been granted or hold it at SN72. I suspect the former, but you never know.

Lyn Greenwood

The issue with SN72 and Mexicans is probably one similar to Highley and two passenger trains in opposite directions at the same time - down to the Signalman not to be so stupid!

" said:

Regarding ARS at Thingley in the Swindid sim (when chained to Westbury), I was wondering whether the ARS system would move a train to signal SN74 if it was due to travel along the Branch but the slot had not been granted or hold it at SN72. I suspect the former, but you never know.

Lyn Greenwood

Not sure how to read this, as in how it is in realiaty or in the sim, but in realiaty, neither Swindon or Wootton workstations contain ARS.

James

Peter,

I have been looking at this fringe as DJW and myself had a problem with the track circuiting on a multiplayer game.

Unfortunately, I have been a bit busy at work so have not yet completed my research yet.

Lyn, the real panel at Westbury looks nothing like the simulation, and some of the track circuit indications for the SN tracks are only shown in one direction. The issue with SN72 and Mexicans is probably one similar to Highley and two passenger trains in opposite directions at the same time - down to the Signalman not to be so stupid!

As the above wording 'in the Swindid sim' implies, I'm not referring to the real location but to the Swindid simulation, which does have ARS at Thingley.

I did an experiment and was pleasantly surprised then disappointed. If a train is travelling along the Melksham Branch towards Thingley Junction and a train is approaching Chippenham bound for Bradford Junction, then the Swindid ARS does in fact hold the latter train at signal SN72 (even though the route SN72 to SN74 is available), but as soon as the former train clears the Down Main at Thingley East Junction, ARS sets the route SN72 to SN74 before it requests the slot from Westbury, thus creating a possible 'deadly embrace' if the slot is not granted, which could easily happen if Westbury and Swindid are chained, hence my reference to chaining in an earlier post. What the Swindid ARS should do is hold the train at SN72 until the slot has been granted.

Looks like the Swindid ARS handling at Thingley Junction needs a little 'tweak'.

Lyn

Can you explain what the reference to 'Mexicans' in the above is all about?

" said:

Peter,

I have been looking at this fringe as DJW and myself had a problem with the track circuiting on a multiplayer game.

Unfortunately, I have been a bit busy at work so have not yet completed my research yet.

Lyn, the real panel at Westbury looks nothing like the simulation, and some of the track circuit indications for the SN tracks are only shown in one direction. The issue with SN72 and Mexicans is probably one similar to Highley and two passenger trains in opposite directions at the same time - down to the Signalman not to be so stupid!

Hello Stephen, long time no see. How's life treating you these days?

Can you explain what the reference to 'Mexicans' in the above is all about?

Lyn

I have posted about the same issue, here:

http://www.SimSig.co.uk/index.php?option=com_kunena&view=topic&catid=37&id=38549&Itemid=0

Very disturbing to find two trains staring each other in the face at Thingley Junction, and then the train from the Melksham single just disappears, when, in real life, it obviously could not..

Maybe your new post may galvanize some action, but I doubt it.