Quote:
Originally Posted by Hot Rod
One other thing I was wondering, why do we have to wait for the entire line to finish construction for it to open?
Couldn't we phase construction to follow the TBM - where we work on the station ahead of time so that once the TBC reaches and clears it, that station becomes the new MLine terminus.
For example, we build the enhancements to Cambie/City Hall station (including more/proper exits and perhaps go ahead and extend the Canada Line platforms while we're at it), then the TBC reaches and clears the station; track is laid and then MLine terminates there. Then Oak, then Granville, then Arbutus, then (assuming we keep going) McDonald, Alma, so on. .... This would be a HUGE win for the system as MLine connectivity to Canada Line provides another transfer point along with being able to service employment areas in the Midtown CBD sooner.
BLine would still run until the full line is open, but why can't we phase the opening of the line expanding the terminal point as we proceed west. ...
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part of the problem is the construction equipment, the conveyor belt for muck and other debris, and the construction tracks in the tunnel created by the tbm that needs to run from the construction pit at will become the gnw station to the tbm at the west end of the tunnel. also the special lighting, air ducts, construction power and water needs during construction are different than what the skytrain cars need. Since gnw station site would start out as the tunnel portal construction pit during construction, it cant have trains going through the construction pit . Only when the pit is rebuilt as gnw station to connect the finished tunnel with the elevated tracks north of gnw campus and connecting to vcc station, will the tracks and tunnels be capable of running test trains and then revenue trains.
the evergreen extension elevated and outdoor sections were completed before the clark tunnel, so to do testing east of the tunnel, a train was trucked to falcon yard and placed back on the tracks. The section west of the tunnel was tested by running trains between Lougheed to Burquitlam. Only after the tunnel was finished (and construction equipment and personnel removed from the tracks) were test trains run trough it between Lougheed and Lafarge Lake