Motorists have been invited to debate the use of cameras

Road user organisations - especially those who disagree with the use of the devices - have also been invited to the seminar in Abingdon, Oxfordshire.

The charity Brake and the Association for British Drivers will also be at the meeting set up by Thames Valley Police.

Speed cameras save 100 lives a year, according to a recent government study.

Driver psychology

The speed enforcement and casualty reduction seminar, the first of its kind in the Thames Valley, has been organised to encourage debate about the controversial issue.

Along with senior police officers, the delegates will include representatives from the RAC, the British Motorcycling Federation, Right to Ride and Thames Valley Police collision investigation unit.

Professor Frank McKenna, from the University of Reading's psychology department, will also deliver a presentation on driver psychology and behaviour.

The accident rates on roads with cameras shows a 40% cut in the numbers of people killed and seriously injured, government research claims.

The meeting is being held at Drayton Golf Club on Thursday.