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How is the actual arrival time of a train defined (SWR)?

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WelshBluebird

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Arrival times are wheelstop times.

So those who have said it is based on signalling reporting times are wrong? It can't be both!
Added to that, I have personally seen NRE and RTT etc report a train as arrived when it has not quite yet made it into the platform, certainly suggests the times are not "wheelstop" times at all.
 
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Muzer

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So those who have said it is based on signalling reporting times are wrong? It can't be both!
Added to that, I have personally seen NRE and RTT etc report a train as arrived when it has not quite yet made it into the platform, certainly suggests the times are not "wheelstop" times at all.
As I said in my post, it is *nominally* wheelstop times, imperfectly calculated based on signalling system reporting times. It's not that hard to understand - the former is what they're trying to measure, and the latter is the data they're using to measure it.
 

Loop & Link

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Some reading which explains it more.

http://orr.gov.uk/__data/assets/pdf_file/0015/2355/right-time-performance-2013-01-22.pdf

Thankfully, in my area with the added benefit of CCTV, I’ve never seen anything inaccurate between the time train comes to a stand, with the time (in seconds) on the CCTV clock, the CIS information time and the Trust/TD report.

I know, we have one area where the CIS will show the train as “Arrived” but the train is still a good few minutes away, simply because it’s such a long section, you see the usual comments on Twitter about us “fiddling” the performance figures, but in reality the time actually derived from the berth offset is still correct to when the train did actually arrive.

Obviously it’s no good to the passengers as it does look bizarre saying the train has arrived when it clearly hasn’t!
 

WelshBluebird

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As I said in my post, it is *nominally* wheelstop times, imperfectly calculated based on signalling system reporting times. It's not that hard to understand - the former is what they're trying to measure, and the latter is the data they're using to measure it.

Extrapolated wheelstop time based on averaged time between passing the detection point and stopping in station.

So to just say it is wheelstop time is inaccurate and best and misleading / lying at worst.

Obviously it’s no good to the passengers as it does look bizarre saying the train has arrived when it clearly hasn’t!

Misleading more like.
 

bb21

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So those who have said it is based on signalling reporting times are wrong? It can't be both!
Added to that, I have personally seen NRE and RTT etc report a train as arrived when it has not quite yet made it into the platform, certainly suggests the times are not "wheelstop" times at all.
Wheelstop times are the national standard for the moment.

I am aware of certain TOC and certain fleets with the capability to report actual door release times, but this is currently restricted in scope so is not suitable as a national standard which is required to be consistent in approach.
 

bb21

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Misleading more like.
As I said before, there are various considerations in setting the national standard. If you are unhappy about it, the only real way to change things is to lobby the government into investing and updating the necessary infrastructure, which is going to cost money.

Short of that, I understand that in the event an extended delay is experienced by the customer resulting in a substantial discrepancy between the actual door release time and the system logged time, they should be captured in control logs so the matter can be investigated. Various fleets around the country also have onboard data that can be interrogated in the event of a dispute, but these are only ad hoc measures should a dispute be logged.

The system otherwise works well overall and has worked well for the last however many years it has been in use.
 

WelshBluebird

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Wheelstop times are the national standard for the moment.

I am aware of certain TOC and certain fleets with the capability to report actual door release times, but this is currently restricted in scope so is not suitable as a national standard which is required to be consistent in approach.

My point is that it isn't wheelstop times that are being reported though.
So claiming it as that is simply misleading at best.
It is a time calculated based on signalling reporting times and some time added onto that to fudge the number.
If the railway is serious about providing passengers will accurate and useful real time data, then that is not good enough.

Now, as for the solution? I don't know. In an ideal world all stock would report door release times. In a slightly less ideal world all platforms would have reporting markers (so at least the real wheelstop time is recorded). In the real world - can ToC's just make it clear to passengers that the arrival time recorded may not be 100% accurate and as such give a few mins leeway on delay repay claims?
 

bb21

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The berth offsets are regularly recalibrated. The differences are usually marginal. I can only speak from experience, and all cases I have interrogated so far in the last few years (a lot of trains for that matter in various locations), there is only a very small number out by more than 10 seconds.

Problem is we do not live in an ideal world, no matter how much you want that to happen. If you have a better solution which works well for all stakeholders concerned then I am sure the DfT and Network Rail will be more than happy to hear from you.
 

WelshBluebird

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The berth offsets are regularly recalibrated.

Problem is we do not live in an ideal world, no matter how much you want that to happen. If you have a better solution which works well for all stakeholders concerned then I am sure the DfT and Network Rail will be more than happy to hear from you.

In terms of providing accurate real time information to passengers, I agree that we do not live in an ideal world. Though I do think the industry should be working towards that.
However, in terms of delay repay, I provided an answer to that:

In the real world - can ToC's just make it clear to passengers that the arrival time recorded may not be 100% accurate and as such give a few mins leeway on delay repay claims?
 

bb21

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In terms of providing accurate real time information to passengers, I agree that we do not live in an ideal world. Though I do think the industry should be working towards that.
However, in terms of delay repay, I provided an answer to that:
I suggest that you raise that issue with the DfT.
 

najaB

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In the real world - can ToC's just make it clear to passengers that the arrival time recorded may not be 100% accurate and as such give a few mins leeway on delay repay claims?
Given this:
The differences are usually marginal. I can only speak from experience, and all cases I have interrogated so far in the last few years (a lot of trains for that matter in various locations), there is only a very small number out by more than 10 seconds.
I can't see why leeway of minutes should be granted.
 

bb21

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Given this:
I can't see why leeway of minutes should be granted.
Just to point out that I added it in the aftermath as an edit, so he may not have seen it. ;)
 

WelshBluebird

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Given this:
I can't see why leeway of minutes should be granted.

As I travel in GWR land, and GWR don't have Delay Repay (despite the noises that have been made about it, but that is a discussion for another thread!), it isn't really something that directly affects me. But for the moment assume it would.
If my train is 14 minutes late into Bristol Temple Meads, but because the train shows arrived as it trundles slowly into the far end of the platform (due to the slow speed limits and change in stopping locations put in force after the recent resignalling) the actual time recorded is 13 mins late. It then has to be coupled or decoupled to another unit the doors don't open until 16 minutes late, why should I be denied money back? I was still delayed by 16 mins, but the only record the ToC will have is that it was 13 mins late (even though it didn't actually stop unit. How is that at all a good situation? I would expect the ToC in that scenario to pay up, but based on the current situation, they are not guaranteed to.

The differences are usually marginal. I can only speak from experience, and all cases I have interrogated so far in the last few years (a lot of trains for that matter in various locations), there is only a very small number out by more than 10 seconds.

Well I guess I'll have to provide specific examples when I can then!

I commute from Oldfield Park to Keynsham, and I know that NRE and RTT show the train as arrived at Oldfield Park before the train does come into the platform, we are probably only talking 30 seconds or so, but it is enough to be noticeable, and as ToCs do reject delay repay if its a minute shorter than the time they allow it for, then it can impact people. And that is at a small station where the platform is small, the dwell time is short and there is no coupling / decoupling of units etc.

I also sometimes travel from my girlfriends near Montpellier to Keynsham, and have noticed there that the reporting is even weirder, with a service showing as arrived at Montpellier even though it hasn't yet in reality left Redland!

And then you have entire sections of lines that don't have any real time reporting at all (e.g. Treherbert to Porth on the Cardiff Valley Lines).

Now, I don't know if there is other timing data that is used for Delay Repay etc in these cases (if there is, why can that data not be made public?), but certainly from what a passenger can access, the data is just not accurate at all.
 
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bb21

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Well I guess I'll have to provide specific examples when I can then!
...
All I can really say is that if you notice a consistent pattern of erroneous records then it may be worth bringing it to the TOC's attention so that it can be raised with NR for necessary re-monitoring and re-calibration to be arranged.

Outwith that I wouldn't really know about your specific case as it is not one of ours so can't really comment on that.

At locations which are not monitoring points, various approaches are available when it comes to deciding compensation. Some will simply take the worst lateness data at next immediate stations either end, some may interpolate in some sort of way, while others simply take the customer's word for it or give it a bit more leeway than usual. Again any specific disputes from the customer it can then be investigated further.
 

Clip

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As I travel in GWR land, and GWR don't have Delay Repay (despite the noises that have been made about it, but that is a discussion for another thread!), it isn't really something that directly affects me. But for the moment assume it would.
If my train is 14 minutes late into Bristol Temple Meads, but because the train shows arrived as it trundles slowly into the far end of the platform (due to the slow speed limits and change in stopping locations put in force after the recent resignalling) the actual time recorded is 13 mins late. It then has to be coupled or decoupled to another unit the doors don't open until 16 minutes late, why should I be denied money back? I was still delayed by 16 mins, but the only record the ToC will have is that it was 13 mins late (even though it didn't actually stop unit. How is that at all a good situation? I would expect the ToC in that scenario to pay up, but based on the current situation, they are not guaranteed to.

From my experience of this action happening the doors have always opened before any attachment has occurred but thats always been in SET territory may be someone with experience can clarify for Bristol?
 

Loop & Link

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I commute from Oldfield Park to Keynsham, and I know that NRE and RTT show the train as arrived at Oldfield Park before the train does come into the platform, we are probably only talking 30 seconds or so, but it is enough to be noticeable, and as ToCs do reject delay repay if its a minute shorter than the time they allow it for, then it can impact people. And that is at a small station where the platform is small, the dwell time is short and there is no coupling / decoupling of units etc.

I also sometimes travel from my girlfriends near Montpellier to Keynsham, and have noticed there that the reporting is even weirder, with a service showing as arrived at Montpellier even though it hasn't yet in reality left Redland

See again about berth offsets, so even though it may say arrived, it hasn’t, but the time it actually arrived which is displayed will be accurate.

Redland/Montpelier is an interesting one again, location of axle counters and the closeness of the stations plays a part here, I imagine. So when the train occupies the berth at Redland it sends a report to Redland and Montpelier but time is accounted for in the offset for Montpelier to show the accurate arrival time.
 

Chris Butler

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On a recent delay repay with Cross Country the delay at Taunton was 59'30" per Real Time Trains. I anticipated an argument because I timed it and actual arrival for down trains is 35" after the Real Time Trains reported time.

In fact they paid on the basis of a 60'+ delay without querying it. I assume that they do apply some leeway or allowance.
 
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