A bit late to reply, but today the Norwegian Broadcasting Co. ran a story on how effective average speed cameras were; they are currently deployed 27 places, an

A bit late to reply, but today the Norwegian Broadcasting Co. ran a story on how effective average speed cameras were; they are currently deployed 27 places, and overall, the number of deaths and severe injuries is halved compared to the situation prior to average cams being deployed on those same sections of road. I guess it could be argued that the increased safety of highways is taken into account when the speed limit is determined - and perhaps also that the idea that safety is excel leads people who speed to exceed the posted limit by a larger margin? Edit: also, the average speed ones perhaps unsurprisingly led more drivers to observe the limit - on average sections, 1 driver in 7000 was caught speeding; single cameras? 1 in 1680.