reply to post by IrvingTheExplainer
Well, the photo in the article at least answered one question I had. Although I live here, haven't been seeing clear pictures of the track layout,
local news is all about scooping each other, and light on analysis.
I have a nodding acquaintance and familiarity with Metro, and how it operates. Actually, it has a cousin, BART in San Francisco.
But, back to my point: I see this as a tragic accident, likely due to equipment failure. Because, looking at the photo, it is obvious that the
stopped train was hidden around a blind curve, so that the following train couldn't see it in time to stop manually.
BTW, the stopped train was waiting for another ahead to clear the station platform. Happens all the time, especially during rush hour. Some of the
lines have just two minute spacing between trains.
Of course, block detectors (track occupancy detectors) are supposed to indicate to the system, not only to the automated signals, but to the main
dispatch center. Usually the acceleration and braking is automatic, but there are reports cropping up, now, of slack maintenance and NTSB warnings
stemming from as far back as 2006 regarding the upkeep of systems. As always, it's blamed on budget shortfalls, etc. I think (no first-hand
knowledge, just educated guess) that for some time now the 'system' has been relying on the Human factor...because of course the trains can be
driven manually, and all automation disconnected. So, if the automation is acting up, just revert to manual.
Not knowing how far from the station this occured, hard to estimate the speed, but judging from the curve radius in the photo (which may be
exagerrated by the camera lens) I'd guess that she (the operator) would have been down to under 35MPH...again, purely guessing at what speeds they
take on curves. Still, a train is hard to stop, even at that relatively slow speed. AND the operator, and people in the forward car of the moving
train, and the last car of the stopped train, have no protection to speak of.