Swindon Speed Numbers
Accident data shows that in the first nine months after the devices were scrapped in Swindon, there were 315 road casualties in the area as a whole, compared with 327 in the same period the previous year.
In total there were two fatalities – compared with four in the same period previously – and 44 serious injuries, down from 48.
I am not sure that these figures would pass a proper statistical significance test as a proof, but they can be called at least indicative.
And proof that the turning off the cameras didn't lead to an immediate massacre of the innocents.
If there had been a slight rise in accidents I'm also sure that the Speed Camorra would not be urging restraint on the use of the numbers until a longer period has been recorded. I seem to recall this was an experiment that was too dangerous to run in the first place.