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Due to failure in the IT system, it is not possible to run any trains today

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Re: Due to failure in the IT system, it is not possible to run any trains today

#301

Earlier quoted context omitted.

I am not familiar with European train, but it seems that they did? > The international trains are not affected by this failure. > The night trains can still run.

That isn't useful for 99% of passengers. He obviously meant run a reasonable percentage of trains, like 25-50%.

Maybe we have different definition of fewer trains, because I wouldn't expect more than 10% at most, realistically 2-3%. And those trains are probably already 2-3%.

Re: Due to failure in the IT system, it is not possible to run any trains today

#302

I think it’s worth mentioning that while the IT system couldn’t coordinate the trains safely, it was a management decision to stop them from running. Coordination can happen myriad ways. For example, trains could operate according to their normal schedule, and if one needed to deviate they could radio in, and an operator could let downstream trains know to proceed accordingly. Maybe simple cell-phone GPS pings could…

The drivers and conductors would like to end up at home at the end of the day. Even if you just run the normal schedule, there will always be disruptions, and there needs to be a system to adjust the planning so people and things end up at the right place at the end of the day. That was the system that failed. Have you any idea how frequent the trains in the Netherlands are and how complex the schedule? "Simply" running the existing schedule is an absolute impossibility.

About the only thing they could maybe have done was to fall back on back-and-forth shuttle trains between major node stations. But that would only provide a very basic service, with incorrect train materiel being used for the normally expected number of passengers. It would be just enough to get passengers and personnel home. I would like to see something like a pen-and-paper schedule that they can fall back on, but they don't have it. (They did something like that at the first corona lockdowns, although with more planning involved.)

Re: Due to failure in the IT system, it is not possible to run any trains today

#303
post #223
post #198

Earlier quoted context omitted.

A much more efficient automation. For instance, running high speed rail without computer signalling would be a huge risk there's no sense in taking ( due to the speeds involved, by the time you see anything of issue like a train or damage in the tracks in front, it's too late to stop).

I think that's a bit of a leap from what I was saying. I didn't imply that all software and computation is bad. Obviously, a human cannot live handle any control system that needs even remotely fast operation. The point is that due to scaling issues, we're removing humans from systems where humans excel or could serve as backups in the event of failure (and actually vice versa). Scale creates problems that are partia…

> There are many, many examples where that is both not true and true. For the not true cases, just see literally any customer service interaction with a large company in the past half decade. I suppose this could be arguable though if one asks the question "efficient for who?".

Another example I love, that is even less ambiguous, is restaurants (traditional, not fast food) that require waiters to take orders on touchscreen PoS systems, instead of taking the orders on a notepad and inputting them later. The touch screens are incredibly slower on a bigger party ordering appetizers, a main course, drinks and desert - it takes forever to navigate back and forth and find the right item, and usually has to be done again and again for each diner. By comparison, a notepad allows the waiter to write down exactly what they hear, often just making small extra notes to indicate duplicate items.

Of course, this particular one could be improved by arranging the menus more naturally for someone taking orders, and several other conveniences (such as always keeping the current order on screen, to easily tap to add "oh, and another beer for me", "I'll have the same desert as her" etc).

Re: Due to failure in the IT system, it is not possible to run any trains today

#304

The fact that it happened on a Sunday suggests to me that this is the result of a service outage gone awry. Realize that the trains failing on a Sunday is really not a big deal. However, if the trains don't run for Monday morning rush hour that is a big deal. I bet they made a change Saturday night and something broke Sunday morning. It's now Monday morning here and the trains are back to normal in time for rush hour…

I have to say that I do find this framing which says "well, it didn't affect business, so no big deal" to be somewhat distasteful. It's completely dehumanising. Why run the trains at all at the weekend, if a weekend outage is no big deal?

That's not the framing. For the majority of travelers, missing a weekend trip is an annoyance. In contrast, missing their work is a major headache, for them personally. It also cascades pretty badly if it happens on a lathe scale - meetings get pushed and overlap others, suplliers are not able to deliver, stalling production, financial operations get delayed, potentially affecting deadlines - it's a huge mess in everyone's life that won't just go away when trains come back. It's also as true for non-profits, state organizations and schools as it is for businesses.

Re: Due to failure in the IT system, it is not possible to run any trains today

#305
post #259

Earlier quoted context omitted.

The Dutch railways said (in Dutch) themselves that it was a problem with the scheduling software which also has a role in safety. Apparently this is also used to route around for example a stopped train, so when it's not working it's not safe to operate anything but a handful of trains. There was a lot of extra impact because this system also feeds the passenger information so their app, website and information scree…

There is no correlation between the schedule you see at Dutch train stations monitor screens, and the actual schedule of Dutch trains:-) You might see this is an ironic comment, but it is as much that, and as much a technical statement of fact. Sometimes the trains arrive at the correct time ( +/- 10 min) so they correlate to what you are seeing on the screen. But unless it's a delay of 1 hour or more, neither trains…

You either misunderstood, misremembered or were misinformed. As long as I've been taking the trains (20 years or so) here, the monitors have always updated with schedule changes. Even when the information screens were still analogue, they updated with delays and track changes.

It might be that what you heard only applied to international trains, those have generally lagged behind technology-wise (though nowadays there's certainly also real-time schedule information for them).

Re: Due to failure in the IT system, it is not possible to run any trains today

#306
Based in my knowledge as a public transportation enthusiastist in China, I got really surprised to see a IT problem bring the entire system down. There should usually be some "more manual" backup mechanism that allows downgrade and operation of trains without computerized signaling system. By kinds of token signaling it will still be possible to run trains as long as the physical infrastructure is still there. The efficiency will be much lower and more prone to (potentialy deadly) errors, but no more trains today sounds unlikely.

Re: Due to failure in the IT system, it is not possible to run any trains today

#307
post #102
post #69

Earlier quoted context omitted.

That sounds unrealistic given the size of the problem.

They did it before the whole thing was automated. Surely they can do it again.

That was with about a third of the current number of trains.[0] Expect complexity to go up exponentially as you increase the train frequency.

[0] Extremely rough off-the-cuff estimate. They were obviously automating as they went along during the years.

Re: Due to failure in the IT system, it is not possible to run any trains today

#308
post #259

Earlier quoted context omitted.

The Dutch railways said (in Dutch) themselves that it was a problem with the scheduling software which also has a role in safety. Apparently this is also used to route around for example a stopped train, so when it's not working it's not safe to operate anything but a handful of trains. There was a lot of extra impact because this system also feeds the passenger information so their app, website and information scree…

There is no correlation between the schedule you see at Dutch train stations monitor screens, and the actual schedule of Dutch trains:-) You might see this is an ironic comment, but it is as much that, and as much a technical statement of fact. Sometimes the trains arrive at the correct time ( +/- 10 min) so they correlate to what you are seeing on the screen. But unless it's a delay of 1 hour or more, neither trains…

They got GPS tracking on the trains. Any delay over 5 minutes will show up automatically, less than 5 minutes you can see on the app. The train operator took over the information screens, so it's all part of the same company now.

Re: Due to failure in the IT system, it is not possible to run any trains today

#309
post #214

Earlier quoted context omitted.

An absolute legend! My favourite of his jokes: "when I moved to Sweden from Norway, the average IQ went up in both countries".

Take a bit time to understand this joke. Crazy. Especially the new host would not be very appreciated of that la.

It's a known statistical phenonema (Will Rogers phenomenon) [1] used to illustrate the problems when adjustments are made to clusters.

[1] https://en.wikipedia.org/wiki/Will_Rogers_phenomenon

Re: Due to failure in the IT system, it is not possible to run any trains today

#310

Earlier quoted context omitted.

That isn't useful for 99% of passengers. He obviously meant run a reasonable percentage of trains, like 25-50%.

Maybe we have different definition of fewer trains, because I wouldn't expect more than 10% at most, realistically 2-3%. And those trains are probably already 2-3%.

Many international trains were actually not running. I haven't read up on the details yet as I was away this weekend, but I think it was only short cross-border routes that still worked, but not much more. The night trains only started up past midnight. And anyway, even if more than that had run, night trains and international trains only run on a small number of Dutch train routes. The three daytime long-distance international train routes are: Amsterdam-Rotterdam-Antwerpen and onwards, Amsterdam-Arnhem-Duisburg and onwards, Amsterdam-Hengelo-Osnabrück and onwards (several intermediate stations omitted). The only domestic night service is Utrecht-Amsterdam-The Hague-Rotterdam. That's it. You can't fit any serious amount of domestic travel into those more than they already normally carry.
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