Quote:
Originally Posted by Gat-Train
How much more would it have cost to build a light metro with high-floor rolling stock? This would have been better than either a bus tunnel or LRT IMO, as it opens up the possibility of interlining with the Trillium Line without having to scrap the FLIRTs and rebuild the platforms.
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The tunnel would have needed to be dug wider to accommodate larger trains, or possibly even two tunnels would need to be dug. They could have chosen fairly narrow metro vehicles to avoid the double tunnel problem (like the Montreal subway, but on steel wheels) but that would still/also create problems with interlining. Generally, the trains themselves would have cost the same.
Even then, it wouldn't really help the interlining problem. The best type of rolling stock for the Confederation Line would be an actual metro train (think something like the Toronto Subway) which still isn't compatible with the type of heavy rail used on the Trillium Line, both for regulatory reasons but also train width/platform levels, etc.
If they had gone with the narrow body trains like I mentioned above, that would also make interlining complicated because a narrow metro train is certainly narrower than a LINT or a FLIRT.