> Norway's system of timed speed cameras are particularly wonderful -- they simply photograph a car and then photograph it again many kilometers later. If you get there too soon, then at some point, you must have been speeding.
Uk has a combination of:
* Average speed cameras (as per the Norway example)
* Variable speed cameras (where the speed limit varies depending on the conditions of the road and congestion)
* Fixed speed cameras (traditional speed cameras dug in next to a road)
* Mobile speed cameras (as per the bbc article, with a purpose to make sure the position changes each day so locals don’t know where the cameras are).
> These systems are safer for police and drivers as there are no traffic stops for speeding.
Traffic stops in the U.K. are very rare, and even mobile cameras just send the documentation to your registered address with no stop. A stop would only be done in the U.K. if there was a belief that the driving was putting others at immediate risk (eg appears drunk).