whats the point in them anyway? ive never quite understood how ensuring motorists do the correct speed limit for a distance of 10metres covered by the camera will actually affect the rest of the speed they do???
Rightly or wrongly, they are designed (apart from catching the speeders) as a visual deterrant and reminder. If you are forced to consider your speed for that 10 yards the hopes are that you will continue to do so for a while ..... much the same as the old police car sat at the side of the road in days gone by
The short of the long;
I believe that they were originally designed to be deployed at accident black spots, in order to reduce injury and death rates, and that's what the designer of the original Gatso intended (I think he was Dutch if my memory serves me correctly ?!).
However, as soon as the Government/Councils saw a way of making money from the motorist (stealth tax, penalty tax, whatever you want to call it ?), then the idea of having them on our roads got - and excuse the pun - Hijacked into what they are today.
Like many ideas, as soon as you take the 'money making' equation out of an idea, inevitable it can fail.