Quote:
Originally Posted by SebC
Can you elaborate on this? I typically find that 10 km/h over the yellow speeds is usually about as fast as I'd want to go, whereas the white speeds are just completely arbitrary.
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To clarify on GGG's post, the Ball Bank testing for curves were originally done with testing equipment using a 1940s model sedan (not a cube van as far I could find when I first read up on this). This Ball Bank test told you speed what to sign the corner at based on the centrifugal force exerted in the corner on the device.
Most drivers today generally can exceed the warning speed by 15-20 km/h with no significant feeling of discomfort, thanks to advances in car and tire technology. BC recently started recommended electronic ball bank tests or even road scanning devices to measure the curves, and also increased the centrifugal force required to mark a warning speed as well.
It's very noticeable going between Alberta and BC now, and Alberta should probably do the same thing.
Regulatory speed limits are a bit more difficult to describe. If you follow the guidelines to the letter when setting your speed, you can still have plenty of variations that make it feel faster to drivers. Sometimes speeds are definitely lowered because of a perceived safety risk, or just politics, and it doesn't seem apparent though.