I am writing to to clear up some confusion that may have arisen following the publication of Professor Richard Allsop’s speed camera report for the RAC Foundation (‘Speed cameras do cut collisions, says academic’s new guide’ LTT 14 Jun & “Speed camera guidance ‘flawed’” LTT 28 Jun).
As I understand it, Professor Allsop uses the new FTP (Four Time Periods) method that I developed and published on my website in 2008. The FTP method is capable of...
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