Can you imagine though, having a heavy subway line elevated for a good 7 kilometers above Don Mills Road (If it were not underground)? I would imagine lots of rumbling as the heavy cars cross. But with ICTS, building the guideway would be much cheaper (I think it's 4 million dollars saved per...

The Choice between Subway or LRT Why can't we use ICTS (an intermediate form, lighter than a Subway but more capacity than an LRT)? I don't think that a light rail (even on its own right of way, is adequate to serve as an alternate route into downtown. And building a full blown subway...