I live in BC, where speed cameras are banned by law. Right next door is Alberta.

Last time I was in Edmonton, known for extremely car centric design, wide roads, ample highways, etc. I was shocked by how much slower people drove, and as a result, how much safer driving was in general.

You only have to get slapped with a fine a few times before you start learning to control your speed.

I'd go further and say automated average speed cameras are the most effective I've seen. Point speed cameras just get marked on a map and cause sudden braking and acceleration to dodge them - this can be effective at particular danger spots, but I always feel the average speed cameras in the UK are far more effective at changing driver habits in general.

Not in mine. Drivers who know about the camera's location speed down right before the camera and speed up immediately after

I see that more with traffic calming. Slow right down, hit the speed bump and speed up again.

Any solution needs to be wide spread.

Yeah, but those probably cost more and don't make for a nice environment outside of cars. Traffic calming can be super cheap and it makes for a super pleasant environment for everyone.

Traffic calming is usually more expensive than speed cameras. A speed bump isn't expensive but people are usually talking about stuff like bump outs and raised intersections and protected bicycle lanes and wide sidewalks when they are talking about traffic calming. Those are six figures per intersection. Cameras are low five figures.

Traffic calming can be literally some poles or some pots with plants in them. It's the cheapest form of "infrastructure" after paint.

And you can make a traffic camera with a Raspberry Pi. It could be as cheap as a planter. It's the bureaucracy that makes it expensive.

PS plants are expensive, they need very regular maintenance.

Or you can let the plants dry out, the infrastructure is actually the huge and heavy pot :-))