Quote:
Originally Posted by queetz@home
The issue here is the fact that due to the infinite wisdom of Translink, they decided to halt the current Millenium Line to stop at either Production or Lougheed Town Centre at 2016.
Otherwise, both the Evergreen Line which originates from Douglas / LaFarge, and the Millenium Line which originates from Waterfront and overlaps most of the Expo Line route until after Columbia, would end up at VCC / Clarke. The end of a western extension to Arbutus would be the end points for both the Evergreen Line and Millenium Line.
Now, even if the Millenium Line is shortened up to just Lougheed and the Evergreen Line just going all the way to VCC / Clarke at 2016 onwards, doesn't mean the Millenium Line will end at Lougheed forever. In some future date when the demand warrants it and the funding is stable, it too can go all the way to VCC / Clarke or Arbutus. So both the Evergreen Line and Millenium Line would be sharing the overlap from Lougheed Station westward.
Makes sense?
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I agree with you from the view of how the system would ideally work, with the Millennium Line running Waterfront <-> VCC-Clark and the Evergreen Line running from Douglas-Lafarge Lake <-> VCC-Clark. I take SkyTrain from Braid to VCC-Clark every day, and it's going to seem stupid going one stop, transfering, and then continuing.
I do also understand the technical reasons for wanting to avoid interlining though. The trains are meant to operate on a schedule which interlines them perfectly. In practice, that schedule starts breaking as soon as you introduce real-world variables like passengers holding doors, intrusion alarms closing the track, or passenger alarms from on-board the train.
As those delays add up, you end up in situations where multiple trains are trying to reserve switches at Columbia and blocking each other, which adds even more delay.
Then you have a train time-out at Waterfront and all service everywhere has to stop in order to maintain spacing. This is the main reason that when there's guideway maintenance or issues on one of the lines, they run the Millennium Line as turn-backs from Columbia. It significantly simplifies the timing for everything.
Adding Evergreen Line to that, you're now trying to keep Millennium Line trains interlined with two separate lines (Evergreen and Expo), and any delays anywhere will cause a hold across the system.
If they run Evergreen Line independently with no interlining, it could keep operating regardless of delays to Expo Line trains.