https://www.albertaparks.ca/media/6496394/mckinnon-flats-road-upgrade-project_faqsopt.pdf
This has been years in the making with geophysical assessments, environmental impact assessments, social impact assessments, etc.
The short is, widen the road to create effectively two lanes, take the sharpness out of the switchback corners, reduce the grade, and create better drainages for water and runoff. I believe there will be some of the old road removed/recycled as well. There is a ton of fill to cut and move. Suspect the road will be gravelled a lot better to allow safer access in wet and soft conditions. As it is now with no gravel and a clay crown, takes one person going in there when it's super greasy, and, if they can even make it out, they rut the hell out of the road. This should be corrected with the new road.
This link has a crude pre-eng drawing for the public https://www.rockyview.ca/Portals/0/Files/CountyServices/Roads/Updates/2020-McKinnon-Flats-Road-Upgrade-Map.pdf