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    Toronto Ontario Line 3 | ?m | ?s | Metrolinx

    I am not 100% sure this is the reason but dividing the span into two spans allow a shallower bridge deck. This gives you more vertical clearance to the roadway below without having to adjust the grade of the track or the road (which is expensive)
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    Toronto Ontario Line 3 | ?m | ?s | Metrolinx

    They are open-excavating the portal before the slope
  3. I

    Toronto Ontario Line 3 | ?m | ?s | Metrolinx

    Project owners don’t go out of their way to cut down trees for no reason. It can cost more than $500/tree removed in Toronto due to permitting, removal, and compensation planting.
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    Roads: Gardiner Expressway catch-all, incl. Hybrid Design (2015-onwards)

    In terms of price, I think FRP and stainless reinforcements are somewhat similar, stainless steel might even be more expensive. There are some constructability issues with FRP bars because they are very brittle compared to steel. They are hard to bend and are almost impossible to be field bent...
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    Roads: Gardiner Expressway catch-all, incl. Hybrid Design (2015-onwards)

    There are a couple new details that should make the structure more durable: - Stainless steel are being used in areas prone to chlorine penetration (i.e. top of the deck, barrier walls, pier caps) - Concrete deck waterproofing - Elimination of deck expansion joints to prevent water leakage into...

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