If these things were actually used to increase public safety I'd be all for them. Unfortunately our current system rewards corruption, so that's not the case. Speed and red light cams are never actually used for safety, they're used to extract money from the populace.
https://www.digitaltrends.com/cars/red-light-camera-controversy/
This article is about red light cameras rather than speed cameras, but corporations and municipalities (corrupt or just naive) can be trusted to find ways to fuck over the public for profit using the speed cameras too.
Coeur d'Alene? Edit: just saw your name, I'm way off.