I think driving that slow in a residential area basically encourages distraction. People will check their devices more when they're going slow as opposed to when they are going faster.
I haven't looked at the details, but the stats I'm seeing are just an aggregation. Yeah, speed kills, but it's usually because of grossly excessive speed. How many injuries and deaths are there on non-arterial roads? The vast majority of injuries and property damage are on major roads so perhaps they should focus on that instead.
We have a few dumps of snow and there's 300 accidents in one day. If they want to minimize all these societal costs, they should mandate winter tires, drop the speed limit on arterial roads in the the winter and actually clean the non-arterial roads more frequently.
I'd be fine dropping it to 40 but 30 just seems ridiculous. I realistically can't see people driving 30 kmh in an entire neighborhood - they barely do it playgrounds. Plus, with vehicle technology there's a sensors for everything. With collision detection and other monitoring won't a lot of these problems decrease anyway, almost regardless of speed? Maybe some non self-driving cars have this now, but I would think that GPS and speed limit data can be combined so that cars essentially can't go over the limit.
The city is spending all this money studying this problem and consulting with citizens. Has anyone talked to the insurance industry about this? They probably have all the statistics and actuarial data needed to make an intelligent decision. If reducing speed is going to save so much for society, then tell me my insurance premiums would go down as a result and I'd support it.
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