Kyle Campbell
Senior Member
From what I’ve seen in the ARTM report 31 km of the 38 km line is at surface. It appears grade separation is limited to Metro interchanges and rail or Autoroute crossings.
Yeah, as does the rest of the world. Trams aren’t some dirty word that needs to thrown around on here because of outdated information and a strong resistance to them in Toronto.
There's a lot more detail here:
The report shows lots of options at various points, but generally they have recommended on surface, like Finch for most of the length. The big exception is here. From 81st ave under the river, they recommend the tunnel option, with the following logic:
"Les coûts de construction d’un tunnel et d’un pont sont équivalents. L’option de latraversée en tunnel a donc été retenue puisque la construction d’un pont présente descontraintes environnementales importantes qui exigeraient des mesures de mitigationcompte tenu de la présence de milieux humides sensibles, de la faune aquatique et desrives à protéger."
Which I would translate as: The costs for a tunnel and a bridge are equivalent. The option to cross the river by tunnel is retained because the construction of a bridge introduces environmental constraints that require mitigation measures to protect sensitive wetlands, aquatic wildlife and river banks.

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