Road design, safety and Vision Zero

[tomh009]

I believe garbage trucks, buses and firetrucks (and medium trucks of all kinds) can navigate a 9 m turn radius without significant disruption.

It was roads without bus routes or major commercial destinations can manage with a smaller turn radii designed for sedans 1-3 m...larger vehicles can still navigate those roads by significantly exceeding the single lane space, but those vehicles are unusual, no need for to design for them.  There's an argument to be made for garbage trucks as being "frequent", but those come 1-2 times per week, not a high frequency. And emergency vehicles like firetrucks are already intended to monopolize the whole road.

But I mean, this is the recommendation of our complete streets guide in Kitchener, it's not a particularly extreme position. Yet our regional engineers routinely (to this day) use 15m+ turn radii on residential streets. The disconnect is enormous.

Is it the regional engineers using 15m, whereas the city engineers are following the recommendations?