Quote:
Originally Posted by Jebby
They still had to dig up the entire length of the station along Cambie. Digger a bit wider for another 20 meters wouldn't have made a difference overall.
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Actually they may have made a difference.
Remember that the station platform is a relatively level section of track.
If you lengthen the platform, that steepens the grade between the stations.
If the stations are closely spaced or on a steep hill (a longer platform digs deeper into the hillside), the logistics of station platform placement come into play.
Bombardier's proposal needed to be bored because the longer platforms (80m vs 50m) couldn't be built close to the surface with acceptable grades between stations. Then you get into deeper stations with more escalators, etc. (and no future station at 33rd because it would have been too deep).
Even the short Canada Line platforms as built are not level - they have a slight grade over their length.
That's also why there's no station at 16th Ave. - it wasn't feasible to insert a level section of track so close to the other stations without the whole section of the line being much deeper.
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