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Shaked Koplewitz's avatar

The difference between elevated trains and cut and cover is that whole cut and cover has become more disruptive, elevated trains have become muc less so (modern elevated trains are quieter than an average two lane urban highway, and require less large structures). There's a reason countries that actually build metros build a lot of elevated lines (but rarely use cut and cover for tunnels anymore).

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Jason Scott's avatar

The one project shown as cut-&-cover was not. Ottawa’s LRT Line 1 thru the downtown core (which opened in 2019) used a pair of TBMs to bore 2.5km of tunnel & 3 underground stations.

However the Stage 2 extension of Line 1, which is currently being built & scheduled to open in 2026, *is* using cut-&-cover for part of the western extension along the Ottawa River and under a portion of Richmond Rd and Byron Linear Park.

https://en.wikipedia.org/wiki/Line_1_(O-Train)?wprov=sfti1#Stage_2

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