Seem to be so many different types but we should all rejoice at the added safety they afford us :-)))
We have a great system operating here now that can check all kinds of info about the car just by looking at the number plate, saw it in action yesterday on the way back from the seaside. It can tell who owns the car, if it is taxed, if the driver is insured etc. (Andyb can probably confirm) so I guess we will see a reduction in other illegal motoring activities.
Bet they aren't allowed to set it up within 50 miles of a "travellers" site though ;-))))
My mate worked in a police station (not one of the boys though). He said that the standard yellow machines only get you from behind that is why they swivel around, the blue ones can get you front on. It happened to me before I was going forwards towards a yellow camera in a car above the speed limit and it flashed at me, nothing arrived in the post. He reckons it could simply be something small flew/blew in front of the lense and this set it off. I was also told you sometimes see cameras double flash, this is them recalibrating themselves (a magistrate this time).
Mood: R U thinking what I'm thinking?......Oh dear!
If you ever get an NIP for a GATSO using the lines on the road get the pictures so that you can calculate your speed yourself to check up on the calculations from the speed tax office if you think you have doubt over the speed.
There will be two pictures, hence two flashes. The time period between the two flashes is set/known. The distance travelled is known. Time period is known hence the speed can be calculated.