SPEED CAMERAS

[BUNTY]

Does anyone know whether the mobile police speed camera vans can take pictures through the dark windows at the rear or do the doors (rear/side) need to be open or the camera outside?

[WHJ]

As far as I know, ALL speed devices work on the Doppler principle and therefore need an unobstructed view.

[SteveD]

Go here: http://www.ukgatsos.com/ then click on "Links", then "How speed trap radar works". Maybe that will give you the information you are looking for.

[sddsddean]

Most vans either have the doors open or 'letterbox' flaps in the back windows, but beware! It is not unknown for you to be approaching the rear of a van, doing 28mph(!), go past the van and speed away. At this point the operator spins the whole camera rig and gets you disappearing into the distance through his windscreen! Result: Summons, �60, Thank you very much!!