A few weeks back I took our new Canada Line Skytrain (subway) service to YVR airport. Here's a wee video I shot. Actual trip was around 26 minutes; this clip is 3:47.
About 1/3 into the video you'll also notice the tunnel changes shape. The first bit was done via boring (drilling), the rest use cut-and cover (rip open, dig, build, cover). Hence the change from a round to a square tube.
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jawnbc
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Date: 2009-09-07 06:22 pm (UTC)