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Originally Posted by lrt's friend
From what I have heard, the signals are automated and controlled from Montreal. To switch to manual control is something that the city and the railways did not want to take on for safety reasons.
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That issue relates to the two diamonds. Currently they are automated based on the relay circuits at the diamonds themselves. Basically, at the VIA crossing, whoever gets there first gets to go across the diamond first. At the Walkley diamond the freights have to wait until a northbound O-Train has cleared the diamond, with the idea being that the freight will have cleared the diamond by the time the southbound O-Train arrives.
The automation can be manually overridden from the control centre in Montreal to change who gets the clear signal and who gets the stop signal. That would allow for a freight to go through when it normally couldn't, with the consequence of blocking the O-Train.
That's it, that's all. That issue is completely separate from whatever imagined problem it was we had on Tuesday.
There was no signalling-related issue that would have prevented a partial Greenboro-Carleton or Greenboro-Carling service from operating. No intervention from Montreal was required.
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As a result, the O-Train as presently designed is an all or nothing service. This tells us the folly of making a 'temporary' design for the O-Train permanent. It is a very vulnerable component of our rapid transit network that cannot replace the southeast Transitway as the main route into the city from the south end.
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Yes, go ahead, blame the physical system and its initial design for what is in actuality a management problem. That problem could probably be solved by a management purge.
Shutting things down is the bureaucratically "safe" thing to do. Trying to figure out a workaround requires some creativity and taking a bureaucratic risk. It's not bureaucratically "safe", regardless of how physically safe it is.
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A priority for the O-Train is to eliminate the diamond near Confederation Heights. That takes us back to some of the design elements from the cancelled 2006 plan. That diamond is the major source of having an all or nothing service. This is also another argument for not extending the O-Train as it is presently designed. At some point, train frequency demands that a diamond be made grade separated.
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From the foregoing, it's pretty clear you have not the faintest idea what you're writing about. Of the two diamonds, the Ellwood (Confederation/VIA) diamond is the least problematic for the simple reason that relatively short VIA trains don't take very long to clear the diamond. Under the present circumstances of CN pretty much dismantling the rail network west of Walkley Yard there's not a lot of freight traffic going across the Walkley diamond, but from an operational perspective dealing with long, slow-moving freight trains crossing your track is far and away more problematic than dealing with short, fast-moving passenger trains. Indeed, that very problem goes a long way to explaining why the Beachburg Sub has a number of road overpasses along it whereas the Smiths Falls Sub used mainly by VIA has virtually none at all (only Hunt Club and Hwy 416).
Had OCR not been taken over by CN, it would still be operating out to Pembroke (in CN's bizarre world, profitable isn't always profitable enough). With the CPR abandonment, OCR would probably have taken control of the CP track beyond Pembroke, and with it the possibility of extra freight trains coming through. That might actually have caused a problem at Walkley diamond where grade-separation might have had to be considered. That was the only diamond worth worrying about, and we're basically past that now.
Even with the frequency doubling later this year, the Ellwood diamond will still function without recourse to grade separation. But on the outside chance that we were to grade separate it, the sensible thing to do would be to convert the Southeast Transitway to rail (even if to run just O-Trains) and then convert the current O-Train trackage between the VIA line and Walkley to a bike path. The idiotic 2005-era plan concocted by busway engineers to build two massive overpasses was just that: idiotic.