Originally posted by Mibz
I somehow missed that Toronto post altogether. To be frank, it's a garbage study to be using as justification. It doesn't account for anything and they admit multiple times throughout that lowering the speed limit probably isn't the best idea. There could be a dozen factors contributing to the numbers but none of them have been mentioned in there. They (the supporters of lower limits) are just looking at raw numbers and saying "There are less deaths on these roads so let's pick ONE aspect of them and make other roads do the same". By the same logic they should be upping the speed limit of those roads to 70km/h because there were even fewer collisions/injuries/deaths. You can't point to such a narrow study as evidence of anything and the study itself acknowledges that.
"But how are they supposed to get proper data without changing the speed limit?"
Great question. The answer is that they experiment. They make the change, they gather the data and they make a decision based on it. Now if they ran the numbers afterward and found that there was little/no change in casualties and reverted the speed limit then I'd be fine. But there's rarely, if ever, experimentation in these situations. Whether it's because of cost or pride or what, I don't know, but good luck getting local Government to admit they've made a mistake and reverse a decision. I am vehemently opposed to poorly thought out solutions to poorly explored problems. Even more so when they're permanent.
"Aren't you going to feel like a tool when the data ends up agreeing with them?"
No. I just want the City to make
educated decisions based on sound research. Holding up that Toronto study and saying "This is why" is embarrassing. That London study kertejud posted is the best piece of evidence I've ever seen in this debate. If it could be expanded a bit to ensure that it's the right fit for Calgary then I'd have no arguments with it. Hell, even without that expansion it's changed my view on the issue.
EDIT: Separately, I'm SUPER curious to know what happened in 2013 to cause the significant drop in casualties in Toronto across the board. Seems way too big to be coincidence.