here in the uk ive started to notice on the road at gatsos just before the white calibration lines there are black squares before and after the white lines!!

what are theses! i though they were something to do with the cameras!
probibly switching them on and off as a car passes them!

or are the used to count the number of cars passing the camera!!

so they know how many have passed and how many have been caught!!

i was hoping flitsservice could answer this!!

the black lines look simliar to those for the spec type timing cameras!