Speed went down, what about the accidents? Any change?
The two don't necessarily need to go hand in hand for the results to be considered effective.
I don't care if 2 cars bang into each other.
I do care if someone I know is in one of them and it amounts to minor survivable thing versus someone potentially dying because some tool was doing 120 in the 70 zone.
Or pedestrians.
Out my way they are actually installing these in busy community areas where pedestrians might indeed be crossing the roads, and in school zones.
Again, I have zero issues with this.