Stoney Trail is what happens when you take the design standards, apply a factor of safety to them, then apply generous clear zones to ensure a barrier free environment. It "feels" better to drive on because the maximum grades, maximum curve radii (horizontal and vertical), and maximum grade changes are all set very high, and it's wide open. The overdesign is really noticable on the East side of the city where you have rail crossings at 16th Avenue and 114th Avenue, and the fills are huge because the vertical curves have to be so gentle and the maximum grade so low.
In BC where they upped the speed limit by 10 km/h, the old "I can drive 10km/h faster than the speed limit" doesn't work on many curves anymore, because now you're at that design limit. Suddenly that curve isn't too comfortable to drive on. You've hit that point where the superelevation of the curve and the combination of friction and gravity no longer do enough to help your car around the corner. It's caused some nasty accidents in the winter when people aren't slowing down for the weather as well. Most of my family and friends in BC don't actually like driving 130 km/h on the Coquihalla or 97C after trying it a couple times (especially in the lower section near Hope). They generally set the cruise control to 120 km/h and they're fine.
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