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Originally Posted by Echoes
^ I'm no transportation engineer, and my understanding of this is really just cobbled together from reading reports and news articles, so somebody please correct me if I'm wrong. But isn't this whole reclassification of College Drive from "rural highway" to "urban expressway" just to permit access points (grade separated or not) in closer proximity to each other, according to the applicable engineering standards? The lower speed limit is thus necessitated because the access points are closer together, and as a result there's more "interference" of off/on ramps or turning and merging lanes interacting with the regular traffic lanes.
It seems to me that with this decision, Council has not made a determination on if these future "access points" will be signalized or grade-separated, but simply that there will be more of them in the end than was originally thought, so the road has to be reclassified and the speed limit lowered by 10 km/hr based on this.
Am I wrong?
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I'm no transportation engineer either, but my job requires I pay a little attention to roadway classifications. From what I can cobble together myself, the designation "highway" refers to any high speed road, but the classification is pretty much up to the jurisdiction that maintains it.
COS doesn't technically classify any roads within city limits as "highway", it's either freeway, expressway, arterial, collector, local or lane. Further, freeways and expressways are categorized as "urban" or "rural" cross-sections depending on the size of right of way and drainage considerations (there is also industrial designation but that's not relevant to this discussion). Roads that are provincial jurisdiction but have agreements with the city for maintenance the city treats as "highway" (for provincial routes) or "local rural"
So when that part of College Dr was annexed, technically it was redesignated as "expressway(rural)" according to the city's own standards, which is based on TAC guidelines and entirely based on functional hierarchy. I don't think the spacing or number of connections factor into the road classification, nor are "rural highway" and "urban expressway" even terms the city standards even reference.
With the original announcement for 80km/h reduction (which I believe should have been done the day the city annexed it) and at-grade connections into Holmwood, it seemed that it was the cross-section that was being redesigned, and as such the classification would change from "expressway(rural)" to "expressway(urban)" which would mean installing storm sewer, curbs and lighting(?) but not eliminate at-grade intersections. I don't think City Council has considered or truly grasps the technical distinctions, but have given clear direction as of last night's on what they want to eventually see ie "freeway(urban)". This seems to contradict what planners had in mind - and perhaps it's all due to differences in understanding the technical language).
Section three of this document has a lot of relevant information about road classifications in Saskatoon:
https://www.saskatoon.ca/sites/default/files/design_and_development_standards_-_section_eight.pdf
edit: also, as for the speed limit, that will indeed be influenced by vehicular conditions. And as for the increased number of intersections, one of the main principles of a roadway hierarchy is that locals and connectors do not tie directly into freeways or expressways - if the city ends up clogging College drive with such intersections they would be going against not just Transportation Canada's guidelines but their own standards as well.