MrGoose
Active Member
This is kind of ludicrous. We could build an elevated metro line to provide that service (at least as far as Lisgar) for less. Elevated subway style line for maybe $10B.
You're probably right about my estimates they are high. Though I'd add that building an elevated metro line (which what a viaduct to Lisgar would be) over an active mainline would cost more than $10B. It adds to construction complexity.
Honestly, California is building their HSR viaducts for 56M USD/KM so 100M CAD/KM over an active rail line is probably a decent worse case scenario estimate.For viaduct, think about $100M /km. If you have to straddle above a singe-track rail-line, it maybe goes up to maybe $120 as long as you can keep the spans less than about 45m and the "straddle" less than 10m. For very large spans in very large valley, or straddling up to 30m, it might get to $200.
Station, which can vary quite significantly in size, would be on top of this. .