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Archer

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  1. Only three mid-line crossovers, and no center/pocket tracks where you can hide a disabled train? Seems to me that they're going to constrain their operations as soon as something happens outside of "normal operations". There should at least be another crossover just west of University Ave so that you can still link up Exhibition to the University leg of Line 1 if there is an issue that takes Queen/Yonge out of the mix. I also don't see why they're putting the mainline-side terminal crossovers so far from the stations. If something happens to the tail-side crossovers, there's no way they'll be able to maintain 90 second headways (which are wildly optimistic anyways) with such large zones of conflict on the mainline side.
  2. You put far too much faith in the Alstom engineers. My first hand experience, having worked with them, is that they are abysmal engineers and have utterly no idea how their software and control systems work. The number of times they have been unable to explain why things happen in the system is unbelievable. Now, some of that may come from the fact that TTC didn't go with the Iconis front-end, instead going with a hybridized version that is similar to the existing legacy signalling interface. But there's utterly no reason why Alstom, who made the entire interface, are utterly clueless as to how it works.
  3. Not intentional, but it certainly isn't going to improve the workforce's opinion of the management team that just managed to lose the private, confidential information of their entire workforce.
  4. Funny that was their priority, since they haven't bothered to try and fix the pay system to ensure that everyone gets paid properly.
  5. Probably because it isn't that simple. The TTC isn't just a bunch of servers; I imagine there are thousands of desktop PCs and laptops on the network as well. All it takes is one of those machines to still be compromised, and you're back to being hacked. I imagine IT has literally pulled the plug on the network to ensure that everything is isolated from one another, and are slowly going through and checking each device one by one before even thinking about reconnecting. Plus, law enforcement is going to be involved, and are going to want forensic data to comb through, so you can't even just wipe-and-reload the servers with the backup because that'll destroy the data they want preserved. And all that assumes your backups aren't compromised to begin with...
  6. Web development has been moving away from separate desktop & mobile versions to a unified design system, in part because you're not having to maintain two separate sites. This isn't unique to the TTC website. Unfortunately, desktop & laptop users these days are the minority. Most people looking at websites are on mobile devices; this is well known among the web development community (we have the analytics data), and designs are now reflecting that. Even my own personal website, which was designed with only desktop in mind, sees about half of it's traffic come over mobile devices.
  7. For those interested in the signal side of things, ATC is live up to Eglinton Station as of yesterday. The crossover at St Clair is also now fully signalized and usable as part of the ATC expansion.
  8. You can see the vent shaft surfacing at the corner of Barrington and Coleman. That shaft is just east of the platform end gate.
  9. I think everyone needs to read this so we're all on the same page: https://www.ttc.ca/About_the_TTC/Commission_reports_and_information/Commission_meetings/2021/June_16/Reports/15_Transit_Systems_Engineering_Osgoode_Interlocking_Incident.pdf. MAN mode is a fully manual mode, even on the TRs - think Emergency Mode on the SRT, as there needs to be a mode where you can override the system completely as an absolute fallback (ie. complete loss of the signal system with trains trapped in tunnels). When a train is in MAN mode, it reports it's position and speed to the system controller. That's it. There is a speed restriction imposed on the train as well, but I believe that is done by the controller on the train. The ATC system is not able to apply the brakes when a train is in MAN mode regardless of what that train does, which is why there are stringent procedures regarding moving of trains in MAN mode. There are no hard limits in MAN mode; a MAN mode train is capable of violating any limits that might exist (red signals, switches not set for route, occupancy, etc). A degraded mode (Restricted Mode, RM) does exist, but as far as I know it is not utilized in any capacity. I don't know why it isn't used. Osgoode pocket had some level of ATC as it could see the train when the incident occurred, but couldn't operate it in any of the ATC modes. It wasn't disabled, but it also wasn't fully operational. Because 123 Run was in MAN mode when it violated the interlocking, the system was unable to stop it with a brake application. My understanding is that the system did see 123 Run violate the interlocking with the crossing the axle counters. In theory, the system could have stopped 114 Run on the mainline as it was in an ATC mode; I don't know if it did try or not. I also don't know if, realistically, it could have stopped 114 Run in time to have avoided a collision, given the momentum these trains have.
  10. This was literally posted two posts above.
  11. To the best of my knowledge, TYSSE was the first time that TTC did not go with tie on ballast for any of their interlockings. Anything prior to that is still tie on ballast.
  12. Would probably come down to risk analysis on the elevated section. Are the guideway walls strong enough to handle a bus hitting them in the event of loss of control?
  13. Also, given the position of some of the axle counters and signals in the ATC retrofit, especially in relation to the platforms, I guarantee that that any new trains will be the same length as the existing trains.
  14. It's roughly five minutes each way. I strongly suspect that half of the service trains will turn back, and half will continue single track to Pioneer Village, giving the single-tracked area roughly a double headway compared to the rest of the line.
  15. TTC Helps literally tweeted to multiple people yesterday that the 2 hour rule only entitles you to two hours of service, and after 2 hours you were expected to exit the vehicle and retap. The tweets have since been removed with the clarification. I can understand why everyone was suddenly up in arms. Found some screencaps/tweets that led to the confusion: https://twitter.com/MetroManTO/status/1233911063667605504/photo/2 https://twitter.com/TTChelps/status/1233916147105509376
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