Road design, safety and Vision Zero

[danbrotherston]

since you've decided you're right, and that if you cannot eliminate all risk, then we have nothing to learn and there's no point in prioritizing reducing harm at all...

Lol,  this was never even close to the argument I was making.  And of course you were the one arguing the absolute.  

Lemme know though, which of your family members you think are worth sacrificing to get somewhere slightly faster?

I can’t roll my eyes enough at this.  This is why probability and things like expected value need to be taught more in schools.

Let me put it this way, I happily drive my family on the 401 instead of taking slower backroads because even though the backroads would be safer I value the convenience more than the extra safety the backroads would give me.

Sometimes though, I might forgo driving in the 401 or other expressways in favour of safer but slower alternatives.  Like if it’s freezing rain or blowing heavy snow at night I’d prefer risking slower accidents on city streets than taking the expressway.

Actually the back roads aren't safer, because the 401 has greater safety features, specifically it eliminates the most common fatal collisions of crossing the middle lane.

But you really are not understanding the point...especially since you're talking about expected value and probability (which I've taken in school by the way).

Just because the probability of being in an airplane crash isn't zero, doesn't mean that engineers build airplanes that they know will crash--unlike traffic engineers who build roads they know will kill people.

Why you refuse to understand this distinction, I do not understand.