Transport for London’s claims for speed camera effectiveness are just the most recent example of long-term flawed and selective analysis (“TfL’s claim of speed camera casualty benefits ‘nonsensical’” LTT 1 Nov).
TfL not only ignores Regression to the Mean (RTM), as Malcolm Heymer points out, but fails even to mention, let alone adust for, camera costs of £30,000 to £50,000 per annum compared to £1,000 per annum for vehicle activated signs....
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