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Originally Posted by Nouvellecosse
I think Calgary, Edmonton and KWC are great examples to show that we're not too small to justify higher order transit, but not so much that we need it at our size.
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I would just say that it's obviously in the menu of options for a city of Halifax's size and growth prospects, while a full-sized subway is not. Beyond that you have to look at specifics which could have a 10x impact on cost. The first pass is just what's order-of-magnitude possible, which is $1B in Halifax but not $10B.
In Halifax the higher-order transit could be used in a smaller geographical area mostly to serve the difficult to serve core, with bus routes serving outlying areas. There are some 5-8 km routes that could potentially be very useful and they shouldn't be compared to proposals for systems of 10s of km.
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We'd either need to spend a lot of money on widening street corridors to give an LRT or BRT dedicated space (while their streets were already wide enough) or we'd need even pricier tunneling. Or both. I'd personally support spending on such a project, but we have to acknowledge the pragmatics that it's hard to get the city and province to fork out for transit. So for all the concerns about the political feasibility of congestion pricing (which yes, are justified), building rail doesn't avoid political obstacles either.
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Part of what is politically difficult is that there are specific bottlenecks causing problems, and wildly different demand for transit vs. roads, but there's also a desire to broadly serve the region and to be seen getting good bang for the buck. Eventually you need to tackle the tough problems though. I wonder if tunneling would really be so prohibitively expensive if used strategically along relatively short segments. Cogswell was a good opportunity to build some kind of underground infrastructure.
IanWatson's example of buying up North Street is a good one. Road widening is in the "accessible" list of options while tunneling is "expensive". But the land acquisition costs in Halifax could be substantial compared to tunneling for a similar length. I would guess elevated rail in a road median isn't necessarily more expensive than buying up a row of peninsula houses of similar length.