I made a track map of the Kingston Subdivision from Toronto to Brockville (where the VIA Brockville Subdivision splits off towards Ottawa), using satellite imagery.
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PDF
here as a roll plan:
I discovered that the benefit provided by the triple-tracked segments is limited by the layout of the junctions at either end. For example, at Moira, in order for an eastbound train to switch from the south track to the middle track, it conflicts with westbound trains on the north track.
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This conflict could easily be avoided by providing an second, crossover, creating a parallel route through the junction:
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My proposed changes (new switches in red), removed switches in light grey:
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That additional crossover is already present at Guildwood interlocking, but is missing from the rest of the places where the line switches from double track to triple track.