dv said:

The Rev Dodgson said:

ChrispenEvan said:

average speed camera work purely on time, not speed. they take a pic at the start then another at the finish. match number plates and calculate.

Which is why “you could go as fast as you like, then slow down to less than trigger speed as you pass the camera.”

There must be some speed below which the camera will not register that the car is a car, so it won’t record it passing.

On what basis do you make this claim?

On the basis that I assumed the cameras were “triggered” by moving objects, but there is a possibility that isn’t actually correct I suppose.