I cannot see the merits of a standalone Guelph-Cambridge rail service, when a bus could offer a cheaper ride with greater frequency and perhaps a one-seat ride through the first and last mile territory at either end. One wonders why there is not already an intensive bus connection on that route....the ridership will indeed support it.
Pushing 2WAD GO rail to Cambridge when we don't even have it to Guelph or Milton seems pretty unrealistic. If we are talking a small number of peak service trains pushed further west from their current terminus, the G+G route may be cheaper to build than the CPKC route, but with a time penalty that may incent potential to drive to Milton instead.
Personally, I'm just not seeing the value in making Cambridge a rail-connected satellite community at all. Some communities will have to be linked by (much better) bus service, and Cambridge is just in the wrong place for a rail link.
- Paul
PS - I would argue strongly for the retention (likely by the Region) of the industrial trackage in Cambridge, perhaps using a contracted shortline. The issue is not how much business exists today, it's how to preserve the employment potential of that industrial area.
If CN wants to abandon the connection to Guelph, that's fine - the remaining business can interchange with CPKC (actually, the railways will fight this kind of transfer of business, with the support of the current regulatory regime.....and that's something that legislation ought to address.... if CN abandons service, they should abandon the "ownership" of any business opportunity along that territory).