Quote:
Originally Posted by ssiguy
GO as it stands right now, is just a commuter train service. RER will be electrified and a maximum of 15 minute service. More like a suburban rail system of Melb/Syd. Montreal looks like it's building real rapid transit while Toronto's will be of limited expense as it stands right now.
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Though the REM's trunk will have 3-6 minute frequencies all day, the branches will run as infrequently as every 15-20 minutes off-peak. I would argue that the REM is actually quite similar to the RER in that respect.
But the RER has the advantage of also allowing longer-distance trains to head downtown as well instead of, say, asking everyone from Barrie to transfer before heading into town. In my opinion, that flexibility is an advantage; you can expand the system more easily and further by allowing hybrid trains which might serve as a metro in the trunk, then serve as regional rail on its branch. And as demand increases on a certain branch, you can decide to electrify it, double-track it and eventually run higher and higher frequencies. However, with the Skytrain model, you have to have shorter lines (because of cost and an inability to have at-grade crossings of even the smallest of streets) and you can't gradually upgrade to it either (except perhaps single-track a branch).
I think that the two major advantages of the Skytrain are low headways and lower staffing requirements. But I think that the former could be compensated by longer trains and the latter is compensated by lower capital costs.