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Originally Posted by calgarygeologist
Having lights there is much more than a minor inconvenience for shag traffic.
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I maintain that delay from this intersection will be mostly negated by the new bridge over Stoney. I have no proof of this but the city does, as they have run it in sim.
There are objective measures for levels of service in an at-grade intersection, and things have to be kept in perspective. Think about the worst intersections in the city like Sarcee/Bow and Macleod/25 Ave. Those would be an absolute F... Shag/Hidden Valley will most likely be a B ("slight delays") or C based on average delay, defined as "acceptable delay" in most manuals i.e. minor inconvenience.
Quote:
Originally Posted by calgarygeologist
An overpass for the traffic Hidden Valley traffic should be a requirement.
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It's because of the aforementioned downgrade of Shag that it's definitely not a requirement; with its previous designation an overpass would have been tentatively planned regardless of volume.
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The adoption of the Calgary Transportation Plan by City Council in 2009 that changed the classification of Shaganappi Trail from a Skeletal Road (freeway type of road) to an Arterial Street made the existing 1970 Shaganappi Trail Corridor Study outdated. The old plan classified Shaganappi Trail as a freeway which no longer fits within the City of Calgary’s long-term transportation plans.
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This is the classification change that nullified plans for a 3-level Stoney/Shag interchange, though a westbound to southbound flyover is still possible based on how they built the original interchange.