I am a new subscriber to this forum, and would like to comment on the leading article appearing in today's Daily Telegraph.
"The case for speed cameras destroyed in a flash"
At the outset, I would say that I appreciate the difference between driving within the pre-determined speed limits and driving at a speed which is commensurate with the prevailing road conditions.
It seems to me that failure to comply with
EITHER of these requirements increases the chance of an accident. It does not matter how one chooses to describe the cause of a collision for statistical purposes. It could, for example be disguised as "letting one's attention wander", but the ultimate factor which causes the damage or injury is kinetic energy, which increases with the square of the speed of the vehicle.
Exceeding the speed limit
Speed limits are imposed for good reasons, and only after careful consideration of the local circumstances involved. Their observance is mandatory. Those drivers who contravene them deserve to be penalised. To this end, speed cameras make a valuable contribution to identifying the offenders and ensuring that they are dealt with according to the law. It would appear that their use should be encouraged, rather than decreased or discontinued. This view of the great effectiveness of the cameras is reinforced by the claim that only five per cent of crashes are now caused by drivers exceeding the speed limit.
Near my home (and the village school!) is a speed limit sign, in a prominent position, which lights up in red, showing
30 each time a vehicle exceeds the speed limit. It makes little difference. Every day, this sign is flagrantly disregarded. Perhaps it should be given some teeth. There is nothing like the possibility of being hit in the pocket for focussing the attention on one's speed!

I cannot help wondering how many more crashes would occur if speed cameras were to be withdrawn.
Driving at a sensible speed, commensurate with prevailing conditions.
Admittedly, this is a more difficult problem, as the responsibility for safe driving ultimately rests entirely with the driver. It is hard to see how any automated system can successfully address all the complex factors involved here. However, I do feel that this should
NOT be advanced as an argument for getting rid of some or all of the cameras.
Perhaps, if it could be shown that if the road conditions at the time of exceeding the statutary speed limit were adverse, (eg wet or icy surface, snow, poor visibility, high traffic density) a higher penalty could be imposed. It may be possible to design a more sophisticated camera that could record & take into account some of these conditions, as well as noting the vehicle particulars.